electron multiplier r8811 for compact mass spectrometers -1000 -1500 -2000 10 2 10 3 10 4 10 5 10 6 10 7 supply voltage (v) gain 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. ?014 hamamatsu photoni cs k.k. subject to local technical requirements and regulations, availability of products included in this promotional material may var y. please consult with our sales office. overview quadrupole mass spectrometers used for residual gas analyzers have been downsized to solve problems of limited installation space. a trend of the downsizing would be an ever-greater de- gree in the future. however, it cannot be achieved just by reduc- ing the ion source and quadrupole electrode sizes. small ion detector is also required essentially. to meet the requirement, hamamatsu has developed a compact ion detector. the unique ion detector breaks the performance barriers on conventional electron multipliers and will prove the ideal result for your needs. tem b0060eb specifications parameter description / value input aperture diameter dynode structure number of dynode stages first dynode material total built-in resistance operating ambient temperature storage temperature polarity of detected ions 3 circular cage 13 al 2 o 3 13 -30 to +50 -80 to +50 positive unit mm m ? c c general parameter value anode to first dynode voltage anode to last dynode voltage faraday cup voltage operating vacuum level bake-out temperature (at 5 10 -3 pa) average anode current a operating gain -2000 200 200 1 10 -2 350 10 1 10 7 unit v v v pa c a maximum ratings parameter value recommened supply voltage gain (typ.) dc linearity (typ.) dark current (max.) rise time (typ.) anode to all other electrode capacitance -1500 1 10 5 5 1 1.6 0.75 unit v a pa ns pf characteristics figure 1: typical gain a averaged over any interval of 30 seconds maximum. note:
tpmh1340e02 aug. 2014 ip electron multiplier r8811 tem a0021ea bottom view side view top view high voltage lead faraday cup lead output lead 20.0 0.5 10 20.0 0.5 19.5 0.5 10 input aperture 3 0.2 dimensional outline (unit: mm) structure this electron multiplier has an off-axis structure and a faraday cup needed for ion detection in quadrupole mass spec- trometers which are capable of making precise measurements over a wide dynamic range with a high s/n. the struc- ture also incorporates a voltage divider, which is essential for discrete type electron multipliers. by simply wiring the high voltage, the signal and the faraday cup, reliable operation can be achieved without adding any other parts. ions emitted from quadrupole are multiplied while being deflected and focused by the electron lens created by the combination of the faraday cup, the ion deflection electrodes and the electron multipli- er electrodes. the layout of the faraday cup, the ion deflection electrodes and the electron multiplier electrodes are designed by special 3d simulation of ion and electron trajectories. this layout al- lows detecting the input ions with high efficiency. tem c0025eb -1500 v electron faraday-cup gnd q-pole positive ion q-pole hamamatsu photonics k.k. hamamatsu photonics k.k., electron tube division 314-5, shimokanzo, iwata city, shizuoka pref., 438-0193, japan, telephone: (81)539/62-5248, fax: (81)539/62-2205 www.hamamatsu.com u.s.a.: hamamatsu corporation: 360 foothill road, bridgewater. n.j. 08807-0910, u.s.a., telephone: (1)908-231-0960, fax: (1)908-231-12 18 e-mail: usa@hamamatsu.com germany: hamamatsu photonics deutschland gmbh: arzbergerstr. 10, d-82211 herrsching am ammersee, germany, telephone: (49)8152-375-0, fa x: (49)8152-2658 e-mail: info@hamamatsu.de france: hamamatsu photonics france s.a.r.l.: 19, rue du saule trapu, parc du moulin de massy, 91882 massy cedex, france, telephone: (3 3)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, tele phone: (44)1707-294888, fax: (44)1707-325777 e-mail: info@hamamatsu.co.uk north europe: hamamatsu photonics norden ab: torshamnsgatan 35 se-164 40 kista, 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 int. 6, 20020 arese (milano), italy, telephone: (39)02-93581733, fax: (39)02-93581741 e-mail: info@hamamatsu.it china: hamamatsu photonics (china) co., ltd.: b1201 jiaming center, no.27 dongsanhuan beilu, chaoyang district, beijing 100020, china , telephone: (86)10-6586-6006, fax: (86)10-6586-2866 e-mail: hpc@hamamatsu.com.cn
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