general parameter description/value unit spectral response wavelength of maximum response photocathode window material dynode base socket nm nm mm dia. 300 to 850 420 multialkali 46 borosilicate glass linear focused 10 jedec no.b14-38 e678-14a material minimum useful size structure number of stages photomultiplier tube R3256 maximum ratings (absolute maximum values) information furnished by hamamatsu is b elieved 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. 1999 hamamatsu photonics k.k. subject to local technical requirements and regulations, availability of products included in this promotional material may vary. please consult with our sales office. 51 mm (2 inch) diameter, multialkali photocathode 10-stage, head-on type characteristics (at 25 c) parameter min. unit parameter value unit supply voltage average anode current ambient temperature 1600 350 0.1 -30 to +50 vdc vdc ma c between anode and cathode between anode and last dynode cathode sensitivity anode sensitivity gain anode dark current (after 30min. storage in darkness) time response luminous (2856k) radiant sensitivity at 420nm luminous (2856k) radiant sensitivity at 420nm red/white ratio anode pulse rise time electron transit time 80 20 0.15 150 64 150 6.4 10 4 0.2 1.0 10 6 5 3.4 31 a/lm ma/w a/lm a/w na ns ns 20 typ. max. supply voltage: 1250vdc, k: cathode, dy: dynode, p: anode voltage distribution ratio and supply voltage electrodes ratio k dy1 2 dy2 1 dy3 1 dy4 1 dy5 1 dy6 1 dy7 11 dy8 dy9 dy10 p 111
photomultiplier tube R3256 figure 1: typical spectral response tpmh1245e02 dec. 1999 tpmhb0595ea figure 2: typical gain and anode dark current tpmhb0596ea figure 3: dimensional outline and basing diagram (unit: mm) tpmha0296ea tacca0044eb socket (e678-14a) 51.0 0.5 46min. faceplate photo- cathode 124 2 147max. 56.5 0.5 14 pin base jedec no. b14-38 1 2 3 4 7 8 9 10 11 12 13 14 dy1 dy2 ic dy4 dy5 dy6 dy7 dy8 dy9 dy10 p dy3 g k 5 6 19.8 11 56 62 30 17 2 200 800 1000 600 400 0.01 0.1 1 10 100 cathode radiant sensitivity (ma/w) quantum efficiency (%) wavelength (nm) cathode radiant sensitivity quantum efficiency 500 1000 700 1500 2000 10 7 10 8 10 6 10 5 10 4 10 3 10 2 10 -6 10 -5 10 -7 10 -8 10 -9 10 -10 10 -11 supply voltage (v) gain anode dark current (a) 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, fa x: (1)908-231-1218 germany: hamamatsu photonics deutschland gmbh: arzbergerstr. 10, d-82211 herrsching am ammersee, germany, telephone: (49)8152-375-0, f ax: (49)8152-2658 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 united kingdom: hamamatsu photonics uk limited: lough point, 2 gladbeck way, windmill hill, enfield, middlesex en2 7ja, united kingdom, teleph one: 44(20)8-367-3560, fax: 44(20)8-367-6384 north europe: hamamatsu photonics norden ab: smidesv?gen 12, se-171-41 solna, sweden, telephone: (46)8-509-031-00, fax: (46)8-509-031-01 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 homepage url http://www.hamamatsu.com
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