XP2262 ETC | Alldatasheet
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Photocathode characteristics Spectral range : 290-650 nm Maximum sensitivity at : 420 nm Sensitivity : Luminous : typ.: 70 µA/lm þ Blue : min.: 9 typ.: 11.2 µA/lmF Radiant, at 400 nm : typ.: 90 mA/W Characteristics with voltage divider A Gain slope (vs supp. volt., log/log) : 9 For a gain of : 3x107 þ Supply voltage : max.: 2400 typ.: 1800 V min.: 1500 þ Anode dark current : typ.: 10 nA þ Background noise : max.: 6000 typ.: 1000 cps Single electron spectrum resolution : typ.: 70 % peak to valley ratio : typ.: 3 Mean anode sensitivity deviation : long term (16 h) : typ.: 1 % after change of count rate : typ.: 1 % vs temperature between 0 and +40°C at 400 nm : typ.: - 0.2 %/K Gain halved for a magnetic field of : perpendicular to axis "n" : 0.2 mT parallel to axis "n" : 0.1 mT Characteristics with voltage divider : B A For a supply voltage of : 2300 1900 V Gain : 6x107 5x10 7 Linearity (2%) of anode current up to : 250 100 mA Anode pulse : Rise time : 2 2.3 ns Duration at half height : 3 3.7 ns Transit Time : 30 31 ns Transit Time Difference between centre of PK and 18mm from it : 0.7 ns Capacitance anode to all dynodes : 5 pF photomultiplier tubes XP2262 product specification PAGE 1/3 18/09/98 ABCDE A standard fast, 12-stage, 51mm (2") tube Applications : High and medium energy physics. Description : Window : Material : lime glass Photocathode : bi-alkali Refr. index at 420 nm : 1.54 Multiplier : Structure : linear focused Nb of stages : 12 Mass : 130 g
Recommended voltage divider Type A for maximum gain K D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 A 4 1.1 0.9 1 1 1 1 1 1 1 1 1 1 (total : 16) Type B for best timing / linearity compromise K D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 A K: photocathode Dn: dynode A: anode Limiting values Anode luminous sensitivity : max.: 2x108 Supply voltage : max.: 2500 V Continuous anode current : max.: 0.2 mA Voltage between : D1 and photocathode : min.: 300 max.: 800 V consecutive dynodes : max.: 400 V anode and D12 : min.: 80 max.: 600 V Ambient temperature : short operation (< 30 mn) : min.: -30 max.: +80 °C continuous operation & storage : min.: -30 max.: +50 °C photomultiplier tubes XP2262 product specification PAGE 2/3 18/09/98 ABCDE Notes þ Characteristic measured and mentioned on the test ticket of each tube. Luminous sensitivity is measured with a tungsten filament lamp with a colour temperature of 2856 ± 5 K. The blue radiant blue sensitivity expressed in A/lmF ("F" as filtered) is measured with a tungsten filament lamp with a colour of 2856 ± 5 K transmitted through a blue filter Corning Cs N°5-58, polished to half stock thickness. Dark current is measured at ambient temperature, after the tube has been in darkness for approximately 1 min. A lower value can be obtained after a longer stabilisation period in darkness (approx. 30 min.). Noise is measured at ambient temperature. After having been stored with its protection hood, the tube is placed in darkness with Vd set at a value to give a gain of 3 10 7. After a 30mn stabilisation period, noise pulses above a threshold of 1 pC (corresponding to 0.2 photoelectron) are recorded. The peak to valley ratio is defined as the single electron peak value divided by the minimum value to the left of the peak. To obtain a peak pulse current greater than that obtainable with divider A, it is necessary to increase the inter-dynode voltage progressively. Divider circuit B is an example of a progressive divider, giving an optimisation of speed and linearity. other dividers can be conceived to achieve other compromises. It is generally recommended that the voltage ratio between two successive stages is less than 2. Measured with a pulse light source, with a pulse duration (FWHM) of approximately 1ns., the cathode being completely illuminated. The rise time is determined between 10 % and 90 % of the anode pulse amplitude. The signal transit time is measured between the instant at which the illuminating pulse of the cathode becomes maximum, and the instant at which the anode pulse reaches its maximum. Rise time, pulse duration and transit time vary with respect to high tension supply voltage Vht as (Vht)-½. Transit Time Difference between centre and edge (18mm from PK centre) is 0.25 ns at 2500 V with C divider. Note : The envelope of the tube is covered with a conductive coating connected to the photocathode on top of which a black paint is applied. This paint is neither guaranteed to be light-tight nor electrically insulating. Care should be taken to avoid electrical shock.
photomultiplier tubes XP2262 product specification PAGE 3/3 18/09/98 ABCDE ref. 90500012 sp: short pin ic: internal connection n: plane of symmetry of the multiplier K: cathode Dn: dynode A: anode XP2262 200 300 400 500 600 700 800 100 Wavelength (nm) Sk (mA/W) Accessories Socket : FE2019 Mu-metal shield : MS172 Typical spectral characteristics XP2262 1000 1500 2000 2500 1E+5 1E+6 1E+7 1E+8 1E+9 Vht(V) Gain A B Typical gain curve