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. 2000 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. photomultlpller tube R7449 28mm(1?/8 inch) diameter, 11?tage, bialkali photocathode, head?n type, low dark current, high stability general parameter description/value unit spectral response 185 to 650 nm wavelength of maximum response 420 nm photocathode materiai bialkali structure number of stages minimum effective area 25 mm dia. window materiai uv glass dynode base suitable socket box and line 11 14?in glass base e678?4c (supplied) electrodes k dy1 dy2 dy3 dy4 dy5 dy6 dy7 dy8 dy9 dy10 dy11 p ratio 1 1 1 1 1 1 1 1 1 1 1 1 suppiy voltage : 1000vdc, k : cathode, dy : dynode, p : anode voltage dlstrlbutlon ratlo and supply voltage maximum ratings (absolute maximum values) parameter value supply voltage between anode and cathode between anode and last dynode 1500 250 unit vdc vdc ma c average anode current ambient temperature 0.1 -80 to +50 characteristlcs (at 25 c ) parameter max. typ. min. cathode sensitivity gain anode dark current (after 30min. storage in darkness) radiant at 420nm radiant at 420nm blue (cs??8 filter) a/lm m a/lm m a/lm-b a/w ma/w anode pulse rise time 4 ns na transit time spread (fwhm) electron transit time 95 88 11 200 60 50 time response anode sensitivity 30 3 2 10 unit ns ns 1.8 10 5 2.1 10 6 luminous (2856k) luminous (2856k) anode characteristics are measured with the voitage distribution ratio shown below. note:
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 photomultlpller tube R7449 figure 1: typical spectral response figure 2: typical gain figure 3: dimensional outline and basing diagram (unit: mm) bottom view (basing diagram) tpmhb0217ea tpmhb0311eb tpmha0464ea socket (e678?4a) tacca0004ea tpmh1271e01 jan. 2000 ip 10 8 10 7 10 6 10 5 10 4 10 3 10 2 500 1000 700 1500 2000 supply voltage (v) gain wavelength (nm) cathode radiant sensitivity (ma/w) quantum efficiency (%) quantum efficiency cathode radiant sensitivity 0.01 200 400 600 800 0.1 1 10 100 1 2 3 4 5 6 7 8 9 10 11 12 13 14 ic dy3 dy2 dy7 dy9 dy11 p dy10 dy8 dy6 dy4 dy5 k dy1 short pin 28.5?.5 25min. faceplate photocathode 112 ?2 13max. 14 pin base 7 2.5 26 11.6 30 35 44 19.1 9 25 2- 3.5
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