photocathode characteristics spectral range : 270-650 nm maximum sensitivity at : 420 nm sensitivity ? : luminous : typ.: 40 a/lm t blue : min.: 5 typ.: 7 a/lmf blue at 130c : typ.: 5.5 a/lmf radiant, at 400 nm : typ.: 50 ma/w characteristics with voltage divider a gain slope (vs supp. volt., log/log) : 7 for an anode blue sensitivity of : 1.5 a/lmf t supply voltage : max.: 1600 typ.: 1300 v min.: 1000 gain : 2.1x10 5 t anode dark current ? : max.: 10 typ.: 1 na anode dark current at 130c : typ.: 15 na pulse height resolution 137 cs ? : typ.: 8.5 % mean anode sensitivity deviation ? : long term (16 h) : 1 % after change of count rate : 1 % vs temperature between 0 and +40 c at 420 nm : - 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 a ? : for a supply voltage of : 1300 v gain : 2.1x10 5 linearity (2%) of an ode current up to : 100 ma anode pulse ? : rise time : 4 ns duration at half height : 8 ns transit time : 36 ns capacitance anode to all : 5 pf photomultiplier tubes XP2206 product specification page 1/3 21/03/2005 a b c d e a tube for hot environment, 10-stage, 51mm (2") tube applications : for scintillation counting and industrial photometry in high temperature environment up to 130c. (unless otherwise stated, all characteristics are given at 20c) description : window : material : borosilicate glass photocathode : high temperature bi-alkali refr. index at 420 nm : 1.48 multiplier : structure : linear focused nb of stages : 10 mass : 110 g
recommended voltage divider type a for maximum gain k d1 d2 d3 d4 d5 d6 d7 d8 d9 d10 a 2 1 1 1 1 1 1 1 1 1 1 (total :12) k: photocathode dn: dynode a: anode limiting values anode luminous sensitivity : max.: 15 a/lmf supply voltage : max.: 1700 v continuous anode current : max.: 0.2 ma voltage between : d1 and photocathode : min.: 150 max.: 600 v consecutive dynodes : max.: 300 v anode and d10 : min.: 30 max.: 300 v ambient temperature : short operation (< 30 mn) : min.: -30 max.: +130 c continuous operation & storage : min.: -30 max.: +130 c photomultiplier tubes XP2206 product specification page 2/3 21/03/2005 a b c d e notes t 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 sensitivity, expressed in a/lmf ("f" as in filtered) is measured with a tungsten filament lamp with a colour temperature of 2856 5 k. light is transmitted through an interference filter. ? dark current is measured at ambient temperature, after the tube has been in darkness for approximately 1 min. lower value can be obtained after a longer stabilisation period in darkness (approx. 30 min.). ? pulse amplitude resolution for 137 cs is measured with a nai(tl) cylindrical scintillator with a diameter of 50 mm and a height of 50 mm. the count rate used is about 10 4 cps. ? the mean pulse amplitude deviation is measured by coupling a nai(tl) scintillator to the window of the tube. long term (16h) deviation is measured by placing a 137 cs source at a distance from the scintillator such that the count rate is ~ 10 4 c/s, corresponding to an anode current of ~ 300 na. the mean pulse amplitude deviation after change of count rate is measured with a 137 cs source at a distance from the scintillator such that the count rate can be changed from 10 4 to 10 3 c/s, corresponding to an anode current of ~ 1 a and 0.1 a respectively. both tests are carried out according to ansi-n42-9-1972 of ieee recommendations. ? 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 c is an example of a progressive divider, giving a compromise between gain, 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)-?.
photomultiplier tubes XP2206 product specification page 3/3 21/03/2005 a b c d e ref.: 0880000 9 sp: short pin nc: not connected ic: internal connection n: plane of sy m metry of the multiplier k: cathode d: dynode a: anode XP2206 100 200 300 400 500 600 700 800 900 1 10 100 wavelength (nm) sk (ma/w) accessories socket: fe2019 mu-metal shield: ms152 typical spectral characteristics 800 1000 1000 1250 1500 1e+4 1e+5 1e+6 gain vht(v) XP2206 typical gain curve
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