ELECTRON MULTIPLIER R8811 For Compact Mass Spectrometers 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 degree in the future. However, it cannot be achieved just by reducing 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. Figure 1: Typical Gain SPECIFICATIONS 107 GENERAL Description / Value 3 Circular cage 13 Al2O3 13 -30 to +50 -80 to +50 Positive Unit mm — — — MΩ °C °C — MAXIMUM RATINGS Parameter 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 105 104 Value -2000 200 200 1 × 10-2 350 10 1 × 107 Unit V V V Pa °C µA — Value -1500 1 × 105 5 1 1.6 0.75 Unit V — µA pA ns pF CHARACTERISTICS Parameter Recommened Supply Voltage Gain (Typ.) DC Linearity (Typ.) Dark Current (Max.) Rise Time (Typ.) Anode to All Other Electrode Capacitance 106 GAIN Parameter 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 TEM B0060EB 103 102 -1000 -1500 SUPPLY VOLTAGE (V) NOTE: A Averaged over any interval of 30 seconds maximum. Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office. 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. ©2014 Hamamatsu Photonics K.K. -2000 ELECTRON MULTIPLIER R8811 STRUCTURE This electron multiplier has an off-axis structure and a Faraday cup needed for ion detection in Quadrupole mass spectrometers which are capable of making precise measurements over a wide dynamic range with a high S/N. The structure 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. GND Q-POLE 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 multiplier 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 allows detecting the input ions with high efficiency. FARADAY-CUP POSITIVE ION ELECTRON Q-POLE -1500 V TEM C0025EB DIMENSIONAL OUTLINE (Unit: mm) 20.0 ± 0.5 20.0 ± 0.5 OUTPUT LEAD FARADAY CUP LEAD 10 19.5 ± 0.5 10 INPUT APERTURE 3 ± 0.2 HIGH VOLTAGE LEAD TOP VIEW SIDE VIEW BOTTOM VIEW TEM A0021EA HAMAMATSU PHOTONICS K.K. www.hamamatsu.com 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 U.S.A.: Hamamatsu Corporation: 360 Foothill Road, Bridgewater. N.J. 08807-0910, U.S.A., Telephone: (1)908-231-0960, Fax: (1)908-231-1218 E-mail: [email protected] Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49)8152-375-0, Fax: (49)8152-2658 E-mail: [email protected] France: Hamamatsu Photonics France S.A.R.L.: 19, 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 E-mail: [email protected] United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road, Welwyn Garden City, Hertfordshire AL7 1BW, United Kingdom, Telephone: (44)1707-294888, Fax: (44)1707-325777 E-mail: [email protected] 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: [email protected] TPMH1340E02 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: [email protected] 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: [email protected] AUG. 2014 IP