L7174 [HAMAMATSU]
The best light source is supported by the best electrode technology; 最好的光源是支持的最好的电极技术
| 型号： | L7174 |
| 厂家： | 
HAMAMATSU CORPORATION |
| 描述： | The best light source is supported by the best electrode technology |
| 文件： | 总7页 (文件大小：1118K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PATENTS
LAMPS
DEUTERIUM LAMPS
The best light source is supported by the best electrode technology.
L2D2 Lamps (Deuterium Lamps )
LONG LIFE : 4000 HOURS
HIGH LIGHT OUTPUT : 1.3 TIMES HIGHER
(L2-2000 Series)
4 times longer guaranteed life
1.1 times higher (L2-4000 series)
ꢀ Life Characteristics
The L2-2000 series lamps
The L2-4000 series lamps
ꢀ Radiant Output Intensity
produce 1.3 times higher
light output than conven-
tional lamps. The L2-4000
series lamps even offer
light output 1.1 times higher
than conventional lamps.
assure an operating life of
4000 hours-4 times longer
than conventional lamps.
This is the longest operat-
ing life of any deuterium
lamp.
4
100
L2D2LAMP L2-2000 SERIES
1.3 TIMES HIGHER
3
2
50
0
L2D2 LAMP
L2-2000
SERIES
L2D2 LAMP
L2-4000
SERIES
CONVENTIONAL
TYPE
1
0
L
T
T
N
IT
(%
CONVENTIONAL
TYPE
L
I
E
S
(
U
0
1000
190
210
2000
TIME(hours)
230
250
270
WAVELENGTH(nm)
3000
290
310
330
350
4000
370
390
TLSOB0050EA
TLSOB0052EA
HIGH STABILITY:2TIMES STABLE
SMALL INTENSITY VARIATIONS : 1/2
Fluctuation: 0.05 %p-p, Drift: 0.3 %/h
Compared to our conventional lamps
The spacing between elec-
trodes is kept fixed by a
molded ceramic spacer.
This reduces the lamp to
lamp variations in the light
output to one half of that
obtained with our lamps
having a conventional all
metal structure.
ꢀ Intensity Variation
By using a newly devel-
ꢀ Light Output Stability
oped ceramic structure, a
TLSOB0053EA
4
uniform and optimum tem-
TLSOB0051EA
L2D2 LAMPS
perature distribution, which
are the most important
factor for stable operation,
can be obtained. This
results in fluctuations of
only 0.05 %p-p in the light
output, as well as a re-
duced drift of only 0.3 %/h.
3.5
3
L2D2 LAMPS
1×10-5AU
TLSOF0138
CONVENTIONAL
LAMPS
2.5
2
APPLICATIONS
UV-VIS Spectrophotometers
CE(Capillary Electrophoresis)
SOx/NOx Analyzers
HPLC
Atomic Absorption Spectrophotometers
Thin Layer Chromatography
1.5
1
CONVENTIONAL LAMPS
Film Thickness Measurement
0.5
0
190
210
230
250
270
290
310
330
350
370
390
TIME (30 s/div.)
WAVELENGTH (nm)
EXCELLENT
LESS MOVEMENT
OF ARC
EMISSION POINT
Use of a ceramic structure with excellent thermal
stability ensures stable lamp operation even in
the presence of ambient temperature variations.
Since the ceramic structure has a small thermal
expansion coefficient, there is virtually no move-
ment of the arc emission point during operation.
TEMPERATURE
CHARACTERISTICS
1
2
L2D2 Lamps (Deuterium Lamps )
SPECIFICATIONS FOR L2D2 LAMPS
Power
Consumption
Type
Cathode Rating
Series
SELECTION GUIDE
An Example for optics of See-through type
SEE-THROUGH TYPE
2.5 V/1.0 V
3.0 V/0 V to 1 V
2.5 V/1.0 V
The see-through type electrode structure enables
straight-line arrangement of the halogen lamp, deuterium
lamp, optical system and optical passage. This simplifies
optical design of UV-VIS spectrophotometer etc., and
eliminates loss of light amount caused by the half mirror.
TOP VIEW
L2-4000
40˚
General Purpose
2.5 V/1.7 V
3.0 V/0 V to 1 V
10 V/2.5 V to 6.0 V
10 V/7.0 V
12 V to 15 V/0 V
2.5 V/1.0 V
L2-2000
L2-2000
30W
HALOGEN
LAMP
LENS
SEE-THROUGH
L2D2 LAMP
See-through
TLSOC0011EF
2.5 V/1.7 V
SPECIFICATIONS
GENERAL PURPOSE
Output Stability
Filament Ratings
Warm-up
Guaranteed Conventional
Dimen-
sional
Window
Spectral
Aperture
Required Dis-
charge Starting
Voltage
Anode
Tube
Drop
Voltage
Typ.
(V dc)
Material
Disiribution
Diameter
Current
Drift
Fluctuation
Operating
D
E
Lamps
Life
Type.
No.
Type.
No.
Series
outline
(p-p)
Max.
(%)
Voltage
Current
Time
Min.
(s)
Voltage
Current
C
Min.
Max.
(%/ h)
Typ.
Typ.
(nm)
(mm)
1.0
1.0
0.5
1.0
1.0
0.5
1.0
0.5
1.0
0.5
1.0
0.5
0.5
1.0
0.5
1.0
0.5
0.5
1.0
1.0
1.0
1.0
(V dc)
(mA dc)
300 30
(V dc, ac)
2.5 0.25
3.0 0.3
(A dc, ac)
(V dc)
1.0 0.1
0 to 1
(A dc)
(h)
q
w
q
q
y
r
r
w
w
e
e
y
i
y
e
e
t
o
t
o
u
u
L6565
L6566
L6301
L6302
L7298
L6303
L6304
L6305
L6306
L6307
L6308
L7296
L7296-50
L7295
L6309
L6310
L6311
L6311-50
L6312
L6312-50
L7293
L7292
350
350
400
350
350
400
350
400
350
400
350
400
400
350
400
350
400
400
350
350
350
350
4
5
1.8
L613,L613-04
L3382-01
—
L6565
L6566
L6301
L6302
L7298
L6303
L6304
L6305
L6306
L6307
L6308
L7296
L7296-50
L7295
L6309
L6310
L6311
L6311-50
L6312
L6312-50
L7293
L7292
L2-4000
UV glass
185 to 400
80
0.3
0.05
4000
20
0 to1.8
UV glass
Synthetic silica
UV glass
185 to 400
160 to 400
185 to 400
1.0 0.1
1.7 0.2
0 to 1
1.8
3.3
L613,L613-04
L1636
2.5 0.25
4
—
L1729
L3381-01
L3382-01
—
UV glass
UV glass
185 to 400
185 to 400
0 to1.8
5
3.0 0.3
10 1
80
F
0.8
2.5 to 6.0
0.3 to 0.6
L591
300 30
20
0.3
0.05
2000
L2196
L2-2000
Synthetic silica
UV glass
160 to 400
185 to 400
—
L1626
L2541
L2526
L4505
L4505-50
L4510
1
10 1
1.2
7.0 0.5
G
G
85
80
12 to 15
0.5 to 0.55
0
0
UV glass
MgF2
185 to 400
115 to 400
L4510-50
L879-01
L879
2.5 0.25
10 1
4
1.0 0.1
1.8
H
—
2000
—
F
0.8
2.5 to 6.0
0.3 to 0.6
SEE-THROUGH TYPE
Output Stability
Guaranteed Conventional
Dimen-
sional
Window
Material
Spectral
Aperture
Diameter
Required Dis-
charge Starting
Voltage
Anode
Tube
Drop
Voltage
Typ.
(V dc)
Filament Ratings
Warm-up
Disiribution
Current
Drift
Fluctuation
(p-p)
Type.
Operating
D
E
Lamps
Life
Type.
No.
Series
No.
outline
Voltage
Current
Time
Min.
(s)
Voltage
Current
Min.
Max.
Max.
(%/ h)
Max.
Max.
(V dc, ac)
(A dc, ac)
(h)
(%)
(V dc)
(A dc)
(nm)
(mm)
0.5
0.5
1.0
1.0
(V dc)
(mA dc)
300 30
L6999
L6999-50
400
400
350
350
350
—
—
L6999
L6999-50
L7307
L7174
L7306
r
!
r
!
r
1.0 0.1
1.7 0.2
1.8
3.3
0.3
2.5 0.25
4
20
L2-2000
UV glass
80
0.05
2000
L7307
L7174
L7306
L1887
—
185 to 400
1.0
L1886
A
B
C
Lamps with an aperture of 0.5 mm diameter are high brightness types. These lamps provide 1.6 times higher brightness than standard lamps with an aperture of 1.0 mm diameter. (Refer to page 8.)
A trigger voltage higher than this value is required to start lamp discharge. For reliable lighting, an application of 500 V to 600 V is recommended. The maximum rated voltage that can be applied is 650 V.
The heater current during warming-up period is so high that the enough voltage may not be supplied to the lamp in case the cable between the lamp and the power supply is long because
of voltage drop at the cable. The power supply for the heater should be designed so as to supply specified voltage at the lamp terminal.
NOTE
F
G
Recommended operating voltage is 3.5 V 0.5 V.
n these lamps, discharge current is allowed to flow into the filament during operation so that cathode temperature is maintained at an optimum level. So there is no need for input of external
NOTE
I
power to keep the filament heated.
H
Average operating life : Operating life depends on environmental conditions (vacuum atmosphere). It is recommended that these lamps be used in an oil-free environment.
D
E
The lamp life end is defined as the point when the light output falls to 50 % of its initial value or when output fluctuation (p-p) exceeds 0.05 %.
L2D2 lamp does not always have a direct replacement for conventional type from its dimensional outline point of view. Please refer to page 5 and 6. Please consult with our sales offices
for further details.
*We recommend using Hamamatsu deuterium lamp power supplies in order to obtain the full performance from our lamps (Refer to page 7 and 9).
3
4
L2D2 Lamps (Deuterium Lamps )
(Unit : mm)
DIMENSIONAL OUTLINES
w L6305, L6306, L6566
q L6301, L6302, L6565
u L7292, L7293
i L7296-50
o L6311-50, L6312-50
e
L6307, L6308, L6309, L6310
30±1
ARC
POINT
35.0--00..015
30±1
30±1
30±1
+0.038
+0.020
28±1
50±1
3
30±1
ARC POINT
50±1
22.0±0.1
22.0±0.1
2- 3.3
2- 3.3
ARC
POINT
ARC
POINT
+0.038
+0.020
37.0±0.1
3
23±0.1 23±0.1
ARC POINT
ARC POINT
ARC POINT
52.0±0.5
15±0.5
+0.15
3
+0.05
LIGHT OUTPUT
LIGHT OUTPUT
CONNECTION
FILAMENT
FILAMENT•GND : BLACK
ANODE
: RED
CONNECTION
CONNECTION
CONNECTION
: BLUE
FILAMENT
FILAMENT GND : BLACK
: BLUE
FILAMENT
FILAMENT
ANODE
: BLUE
: BLUE
: RED
FILAMENT
FILAMENT
ANODE
: BLUE
: BLUE
: RED
CONNECTION
L7292
.
CONNECTION
6
ANODE
: RED
FILAMENT
: BLUE
FILAMENT: BLUE
ANODE
6
6
6
6
FILAMENT
FILAMENT GND : BLACK
: BLUE
6
TLSOA0050EA
.
: RED
TLSOA0011EC
TLSOA0075EA
TLSOA0018ED
TLSOA0040EB
TLSOA0041EC
ANODE
: RED
L7293
FILAMENT
FILAMENT
ANODE
: BLUE
: BLUE
: RED
L6303, L6304, L6999
L7306, L7307
r
t L6311, L6312
y L7295, L7296, L7298
L7292, L7293 mounting example
on the vacuum system
Cross section of see-through type
! L6999-50, L7174
30±1
14±1
-0.05
28±1
35.0-0.1
30±1
50±1
28±1
1
2
3
4
5
40°
22.0±0.1
22.0±0.1
1.0
2- 3.3
ANODE
CERAMIC
a
ELECTRODE
(REAR PIECE)
ARC
POINT
b
ARC
POINT
ARC
POINT
ARC POINT
ARC POINT
ARC POINT
CERAMIC
ELECTRODE
(CENTER PIECE)
SCREW PORTION
+0.15
3
+0.05
CATHODE
APERTURE
0.5 or 1.0
1VACUUM SIDE FLANGE
2TIGHTENING SXREW
3STORRER
4ORING (JIS B2401)
CALL No. V15
LIGHT OUTPUT
LIGHT OUTPUT
15 mm I.D.
4 mm WIDTH
5SPACER
aMgF2 WINDOW
bGRADED SEAL
CONNECTION
CONNECTION
CONNECTION
FILAMENT
FILAMENT·GND
ANODE
FILAMENT
FILAMENT•GND : BLACK
ANODE
: RED
: BLUE
: BLUE
: BLACK
: RED
CONNECTION
FILAMENT: BLUE
FILAMENT: BLUE
L6303/L6304/L7306
FILAMENT
FILAMENT · GND : BLACK
ANODE
: BLUE
6
6
6
6
ANODE
: RED
TLSOA0017ED
TLSOA0039ED
: RED
TLSOA0020EC
TLSOA0051EA
TLSOC0010EA
TLSOA0052EA
L6999/L7307
FILAMENT
FILAMENT
ANODE
: BLUE
: BLUE
: RED
6
5
L2D2 Lamps (Deuterium Lamps )
POWER SUPPLY
TECHNICAL INFORMATION
Extremely high stability of intensity is required for deuterium lamps because of their applications.
Spectral Distribution
Deuterium lamps emit high intensity light in the UV range at wavelengths
shorter than 400 nm. Light intensity on the short wavelength side is deter-
Light Distribution
The non-projecting type uses the side of the cylindrical glass bulb as the
emission window, whilst the projecting type uses a plane glass attached
to a projection on the bulb.
The projecting type has a uniformed transmittance due to the plane glass.
Since the window is located far from the discharge position, the amount
of dirt produced by spattering from the electrodes is reduced resulting in
low deterioration of light output. The non-projecting type requires less
space and has a wider directivity since there is no projection, enabling
effective use of emitted light. The long-nose projecting type uses an
MgF2 window and is suitable for vacuum ultraviolet applications. This
type is used with the tip of the nose inserted into the vacuum equipment.
Therefore, use of a power supply designed to drive the lamps with stable operation is recommended.
,
Hamamatsu s power supply for deuterium lamps uses a constant-current circuit in the main power supply section and
a constant-voltage circuit in the filament power supply section to assure a reliable operation.
Hamamatsu offers not only OEM power supplies specially designed for your applications, as well as the following
types according to the operation mode of various lamps.
mined by the window material used.
Figure 1: Spectral Distribution
TLSOB0024ED
0.5
SYNTHETIC SILICA
(PROJECTING TYPE, 1 mm THICK)
SPECIFICATIONS
Parameter
C1518
C7860
M7628
Unit
Control Methode
Input
Dropper Type
Switching Type
Switching Type
—
0.1
(AC) 90 to 115/180 to 250
Input Voltage
Input Wattage
Output Voltage
(AC) 100/118/230 10 %
(DC) 24 2.4
V
UV GLASS
0.05
(Automatic)
60
Figure 3: External View
100
(DC) 80
(DC) 160
300
48
(DC) 80
(DC) 160
300
VA Max.
V Typ.
V Typ.
mA
Non-projecting type
Projecting type
Long-nose projecting type
With Load
(DC) 80
(DC) 160
300
Without Load
0.01
160
200
240
280
320
360
400
Output Current
Trigger Voltage
Fluctuation (p-p)
Drift
Anode
Output
600 50
0.1
600 50
0.5
600 50
0.5
V peak
% Max.
%/h Max.
—
WAVELENGTH (nm)
Window Material
The following 4 types of window material are available for deuterium lamps.
0.1
0.1
0.1
Output Voltage
See below
See below
20
See below
See below
25
See below
See below
25
(1) UV glass
(3) MgF2
(2) Synthetic silica
TLSOF0139
Heater Output Current
Warm-up Time
—
Figure 4: Directivity (Light Distribution)
s Typ.
Figure 2 shows the transmittance of various window materials.
Long-nose
Projecting type
Non-projecting type
Projecting type
Ambient Temperature
0 to +40
Not required
200 × 107 × 240
6.7
0 to +40
Not required
113 × 122 × 220
2.7
0 to +40
20 CMF of forced air
100 × 118 × 36.2
0.17
°C
—
UV light at wavelengths shorter than 190 nm attenuates greatly due to its
absorption by oxygen. To obtain the fullest performance in window trans-
mittance, it is recommended that the inside of the equipment be filled with
nitrogen or vacuum-evacuated to eliminate this absorption effect.
Cooling
30°
20°
30°
30°
15°
Dimensions (W × H × D)
Weight
mm
15°
10°
kg
0
0
0
Certification
—
—
UL/CE
—
Figure 2: Typical Transmittance of Various Window Materials
10°
20°
30°
15°
15°
TLSOB0038EC
30°
30°
100
HEATER VOLTAGE AND CURRENT
TLSOB0021EA
TLSOB0020EA
TLSOB0077EA
Warm-up
Operation
80
Applicable Lamps
Type No.
Voltage (V dc) Current (A dc typ.) Voltage (V dc) Current (A dc typ.)
Arc Distribution
L6565, L7293, L6999, L6999-50
L7307, L7174, L6301, L6302
L6307, L6308, L7292
60
Arc intensity is determined by the aperture (light exit) size. Figure 5
shows typical spectral distributions for lamps with different aperture sizes.
At the same input current and voltage, lamps with an aperture of 0.5 mm
diameter (high brightness type) provide 1.6 times higher brightness than
lamps with an aperture of 1.0 mm diameter (standard type). The half
width of spectral distribution also becomes narrower with a reduced aper-
ture size. When higher intensity is required or the object to be irradiated
is very small, the high brightness type is recommended.
C1518 (2.5 V)
2.5 0.2
4
1.0 0.1
1.8
MgF2
SYNTHETIC SILICA
40
C1518 (10 V)
10
2.5 0.2
10
1
0.8
4
3.5 0.5
1.7 0.2
7.0 0.5
0.3
3.3
1
UV GLASS
C1518 (SQ2.5 V)
C1518 (SQ10 V)
L7298, L6303, L6304, L7306
L7296, L7295, L6309, L6310, L7296-50
L6565, L7293, L6999, L6999-50
L7307, L7174, L6301, L6302
L7298, L6303, L6304, L7306
L6566, L6305, L6306
20
1
1.2
C7860/M7628-2510
2.5 0.15
4
1
0.05
1.8
100
150
200
250
300
350
C7860/M7628-2517 A
C7860/M7628-3000 A
C7860/M7628-1035 A
C7860/M7628-1070
C7860/M7628-1555 A
2.5 0.15
4
1.7 0.1
0
3.3
0
WAVELENGTH (nm)
3
0.15
5
Figure 5: Arc Distribution
ꢀUV glass
10 0.5
10 0.5
15 0.75
0.8
1.2
0.5
3.5 0.2
0.3
1
L6307, L6308, L7292
UV glass has a higher ultraviolet transmittance than normal optical glass
(borosilicate glass). It has the longest cut off wavelength of 185 nm among
the four types. However the generation of ozone is lower than other wind-
ow material types, it is not necessary to have special anti-ozone treat-
ments.
APERTURE: 0.5 mm
(High Brightness Version)
APERTURE: 1.0 mm
(Standard Version)
7
0.35
L7296, L7295, L6309, L6310, L7296-50
L6311, L6311-50, L6312, L6312-50
5.5 0.3
0.3
1.0 mm
0.5 mm
APERTURE
APERTURE
NOTE AC7860 series are manufactured only when the order is placed.
* Characteristics are measured at 23 1 °C after 30 min of warming up.
ꢀSynthetic silica
X
X
Y
Y
Synthetic silica is obtained by fusing a silica crystal that is artificially
grown. Although its cut off wavelength is 160 nm, it contains less impuri-
ties than fused silica, and transmittance at 200 nm has been improved by
approx. 50 %.
ꢀMgF
2
MgF2 is a crystallized form of alkali metal halide that has an excellent
ultraviolet transmittance, a low deliquescence and is used as window
material for vacuum ultraviolet applications. Its cut off wavelength is 115
nm.
TLSOF0150
TLSOF0068
TLSOF0150
TLSOB0049EB
C1518
C7860
M7628
7
8
L2D2 Lamps (Deuterium Lamps )
TECHNICAL INFORMATION
OPERATING TEMPERATURE
PRECAUTION AND WARRANTY
Optimum Operating Temperature
Precautions When Using Deuterium Lamps
Construction
Discharging the L2D2 Lamps
Figure 6 shows the external view and internal construction of a deuterium
lamp. The anode has a unique structure covered with ceramic to prevent
abnormal discharge, and the cathode has a highly durable electrode.
Since a deuterium lamp uses the positive column flash of arc discharge,
the cathode is shifted sideways and an aperture is located immediately in
front of the anode so that high intensity is obtained. The aperture plate
placed between anode and cathode may be used as an auxiliary elec-
trode for lamps designed for low voltage lighting.
In deuterium lamps, an aperture electrode is placed between cathode and
anode to compress the discharge, so that high light intensity is obtained. This
required, a high voltage trigger discharge across cathode and anode.
In general, a typical power supply for deuterium lamps consists of the follow-
ing three power supplies.
ꢀ Constant current power supply of 300 mA
(open voltage about 150 V)
ꢀ Trigger power supply of 500 to 600 V peak
ꢀ Power supply for the heater (about 10 W)
However, in view of the need for cost reduction, safety and downsizing, lamp
manufactures are evaluating methods that eliminate the trigger power sup-
ply. One of these is the use of an auxiliary electrode. In this approach, the
electrical energy from a constant current power supply of 150 V/300 mA
(main power supply) is stored in a trigger capacitor and then is discharged
between lamp shield box and cathode. This generates ions and momentarily
reduces the impedance between anode and cathode, leading to the main dis-
charge. However, because this trigger discharge occurs only at a restricted
point near the cathode, it is a less reliable triggering method.
In the L2D2 lamp, ceramic insulators are used as part of the electrode sup-
port, so that the aperture potential is isolated from the shield box potential.
Since this aperture electrode is used as an auxiliary electrode, the trigger dis-
charge can be guided to the aperture, allowing operation at a voltage 40 to
50 V lower than that of a conventional lamp. This also results in higher reli-
ability of the triggering operation. Thus, the greatest advantage of the auxili-
ary electrode is that no trigger power supply is necessary. The circuit shown
on the below, resulting both a cost reduction and downsizing of the power
supply.
To obtain high stability and long operating life, ade-
quate care must be paid to operating conditions includ-
ing the operating temperature of the lamp.
1. Deuterium lamps emit ultraviolet rays which can be
harmful to your eyes and skin. Never look directly at
the emitted lights, nor should you allow it to come
into contact with your skin. Always wear protective
goggles and clothing when operating the lamps.
,
Although the lamp s bulb wall temperature (Tb) rises
as the ambient temperature (Ta) rises, the bulb wall
temperature of conventional deuterium lamps normal-
ly rises to approx. +200 °C (direct-heated cathode
type) to 240 °C (SQ cathode type) when the ambient
temperature is +25 °C. Moreover, the bulb wall tem-
perature of the L2D2 lamps rises even further by +50
°C reaching +280 °C due to the way in which the elec-
trode is constructed. (Bulb wall temperature (Tb) also
differs depending on the lamp type and heater voltage
as well as lamp housing.) Although the operating tem-
perature of Hamamatsu L2D2 lamps has been
designed based on lamps operated under normal tem-
perature, the temperature range given in the table
below is recommended as the allowable operating
temperature range enabling the use of the lamps over
a long period of time with high stability.
Since the bulb wall reaches a very high tempera-
ture (over +200 °C) when the lamp is on, do not
touch it with bare hands or bring flammable objects
near it.
2.
Figure 6: External View and Electrode Construction
External view
Construction
Do not exert mechanical vibration or shock on the
lamp, otherwise the stability will deteriorate.
3.
CERAMIC ELECTRODE
(REAR PIECE)
ELECTRODE
ANODE
APERTURE
4. Silica glass graded sealing.
CERAMIC ELECTRODE
(CENTER PIECE)
In the case of bulbs using silica glass, the window
is formed by connecting different glass sections hav-
ing slightly different expansion rates. Since the
mechanical strength of these seams is low, the bulb
fixing method should be so arranged that no force
is exerted on these seams during fixing or opera-
tion.
CATHODE
BULB
LEAD WIRE
BULB
TLSOC0030EA
LIGHT OUTPUT
5.
6.
Before turning on the lamp, wipe the bulb and win-
dow gently with alcohol or acetone. Dirt on the win-
dow will cause deterioration of the UV transmission,
so always wear gloves when handling the lamp.
High voltage is used to operate the lamp. Use
extreme caution to prevent electric shocks.
Terminology
1Solarization
Transmittance of UV glass and fused silica drops when they are used
over a long period. This is caused by a drop in transparency of the
glass resulting from dirt on the glass and the influences of ultraviolet
rays. In the worst case, the glass becomes cloudy and its life is short-
ened. This is called solarization, and transmittance drops, particularly
in short wavelength region. This phenomenon is hardly ever seen with
synthetic silica.
Table1: Allowable Operating Temperature Range for
Deuterium Lamps
Figure 7: Example Circuit Diagram
Auxiliary electrode operation
•
Lamp Type
L2D2 Lamp
Cathode Type
All Cathode type
+10 °C to +50 °C
Ambient temperature: Ta
Bulb wall temperature: Tb
(+20 °C to +30 °C)*
RT
2Discharge starting voltage
(5 kΩ)
TRIGGER
R
+245 °C to +280 °C
+290 °C Max.
ANODE
When the cathode is sufficiently heated and ready for arc discharge, a
pulse trigger voltage is applied between anode and cathode, and dis-
charge starts. The discharge starting voltage of 30 W deuterium lamps
is approx. 350 V (400 V max.). However, since the discharge starting
voltage rises according to the prolongation of operation time, it is rec-
ommended that a voltage of approx. 500 V be applied to assure dis-
charge. (The maximum applied voltage for trigger is 650 V.) The dis-
charge starting voltage varies depending on the trigger method and
trigger constant.
SWITCH
(<3 kΩ)
Warranty
DEUTERIUM
LAMP
Maximum allowable bulb
wall temperature: Tb Max.
300mA
CONSTANT-
The warranty period will be one year after our ship-
ment to original purchaser or guaranteed life time
whichever comes first. The warranty is limited to
replacement of the faulty lamp. Faults resulting from
natural disasters and incorrect usage will also be
excluded from warranty.
CATHODE
CURRENT
POWER SUPPLY
(150 to 160 V dc)
Temperature enclosed by ( ) indicates the optimum ambient
*
temperature.
CT
(>0.1 µF)
HEATER
POWER SUPPLY
TLSOC0019EB
Tb
Ta
3Output stability
(1) Drift
Conventional circuit
•
TRIGGER
SWITCH
Drift refers to variation of output over a long period caused as a
result of the change in thermoelectron discharge characteristic of
the cathode, change in gas pressure or dirt on the window. It is
expressed in variation per hour. In the case of deuterium lamps, it
takes 10 to 15 minutes until the inside of the lamp reaches thermal
equilibrium after start of discharge, so a warm-up period of 20 to 30
minutes is required.
Ta: Temperature measured at
a position 2.5 cm (1 inch)
away from the bulb wall
Tb: Temperature on the bulb
RT
(1 to5 kΩ)
ANODE
DEUTERIUM
2.5 cm
(1inch)
wall (cathode side)
TRIGGER
POWER
SUPPLY
(500 to
LAMP
300mA
CONSTANT-
CURRENT
POWER SUPPLY
(150 to 160 V dc)
CATHODE
(2) Fluctuation
CT
600 V dc)
(0.2 to 0.5 µF)
HEATER
POWER SUPPLY
Fluctuation refers to variation of output caused by deterioration of
the cathode or fluctuation of discharge position. Light output fluc-
tuates approx. 0.05 % at intervals between a few minutes and a few
hours. In addition, the position of the arc point also fluctuates.
As the ambient temperature (Ta) rises, cathode tem-
perature increases, resulting in evaporation of the
cathode. If the ambient temperature (Ta) drops, the
gas pressure inside the bulb is reduced increasing the
kinetic energy of the gas and ions causing sputtering
of the cathodes thermionic coating. In both cases, the
gas inside the bulb is rapidly consumed. This deterio-
rates the stability and intensity. Thereby drastically
shortening the operating life.
4Life
TLSOC0020EB
(1)Fluctuation of light output
When the L2D2 lamp series with an aperture size of 0.5 mm diameter will
be operated by the circuit as shown above, it is recommended to employ
CR constant as RT=1 kΩ and CT=0.5 µF to obtain the reliable lamp
ignition.
Life is determined by the point at which fluctuation combining
fluctuation and shift exceeds 0.05 %p-p.
(2)Drop of light output
Life is determined by the point at which the total emitted energy
drops to 50 % of the initial level. As described earlier, decrease in
light output is caused mainly by solarization and dirt inside the
window. The life specified is 2000 hours for L2-2000 series, and
4000 hours for L2-4000 series.
For stable operation of deuterium lamps, care should
be paid to the installation of the lamps so that the bulb
wall temperature (Tb) does not exceed +290 °C.
10
9
L2D2 Lamps (Deuterium Lamps )
Related Products
Water-Cooled 150W VUV Deuterium Lamps
These water-cooled 150W lamps provide a radiant output 3 to 4
times higher than 30W lamps and are chiefly used as excitation
light sources. Two window materials, synthetic silica(L1314) and
MgF2(L1835) are available.
The MgF2 window type is widely used as a VUV light source in
photo CVD, solar simulator(in space) and other VUV applications. A
vacuum flange E3444 series are provided as an option allowing
simple connection to a vacuum instrument.
TLSOF0140
Calibrated Deuterium Light Source L7820
The L7820 is the calibrated light source consisting of L2D2 featur-
ing high stability and good repeatability, which are required for cal-
ibrated light source.
In order for anybody to achieve stable light, not only the lamp
design but also power supply and lamp housing design are
optimized. It delivers high stable light in the long and the short term
operation especially in the calibrated range of 250 nm to 400 nm.
The L7820 is suitable for quality control of light source, light detec-
tor and so on.
The certificate with JCSS logo mark is attached.
TLSXF0159
UV-VIS Fiber Light Source L7893 Series
This light source L7893 series incorporates a highly stable L2D2
lamp and a Tungsten lamp into a single compact housing with an
optical fiber light guide. The combination of these two lamps cov-
ers a wide spectral range from 200 nm to 1100 nm, yet offers highly
stable light output and long service life. This light source L7893 ser-
ies is ideal for a compact analytical equipment such as miniature
grating units, portable spectrophotometers and reflection meters.
TLSXF0148
Lamp Housing E8039
This lamp housing was designed to allow easy operation of deuteri-
um lamps such as L2D2 lamps and provide full lamp performance.
It accommodates a lamp with a flange so that no optical alignment
is required. The built-in interlock and forced-air cooling functions
ensure high safety. Collimating lenses and fiber guide adaptors are
also available as easy-to-replace options, which easily attach to the
light exit and allow obtaining the desired light beam.
For details, please refer to the catalogs which are available from our sales office.
CE Marking
This catalog contains products which are subject to CE Marking of European Union Directives. For further details, please consult Hamamatsu
sales office.
PATENTS: USA 6, PATENTS PENDING: JAPAN 7, USA 1, EUROPE 7
Information furnished by Hamamatsu is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications are
subject to change without notice. No patent rights are granted to any of the circuits described herein. ©2001 Hamamatsu Photonics K.K.
*
*
WEB SITE URL http://www.hamamatsu.com
HAMAMATSU PHOTONICS K.K., Electron Tube Center
314-5, Shimokanzo, Toyooka-village, Iwata-gun, Shizuoka-ken, 438-0193, Japan, Telephone: (81)539/62-5248, Fax: (81)539/62-2205
U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P. O. Box 6910, Bridgewater. N.J. 08807-0910, U.S.A., Telephone: (1)908-231-0960, Fax: (1)908-231-1218 E-mail: usa@hamamatsu.com
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49)8152-375-0, Fax: (49)8152-2658 E-mail: info@hamamatsu.de
France: Hamamatsu Photonics France S.A.R.L.: 8, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: (33)1 69 53 71 00, Fax: (33)1 69 53 71 10 E-mail: infos@hamamatsu.fr
United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road Welwyn Garden City Hertfordshire AL7 1BW, United Kingdom, Telephone: 44-(0)1707-294888, Fax: 44(0)1707-325777 E-mail: info@hamamatsu.co.uk
North Europe: Hamamatsu Photonics Norden AB: Smidesvägen 12, SE-171-41 SOLNA, Sweden, Telephone: (46)8-509-031-00, Fax: (46)8-509-031-01 E-mail: info@hamamatsu.se
Italy: Hamamatsu Photonics Italia: S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39)02-935 81 733, Fax: (39)02-935 81 741 E-mail: info@hamamatsu.it
TLSO1027E05
SEPT. 2002 IP (0106)
Printed in Japan (500)
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