Novel Faraday cup for the simultaneous observation and measurement of ion-beam currents

Journal Article · Thu Dec 01 04:00:00 EST 1977 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1134961· OSTI ID:7208580

Wei, C; Seidman, D N

A novel Faraday cup is described which allows the simultaneous observation and measurement of ion-beam currents. The Faraday cup is constructed around a Galileo channel electron multiplier array (CEMA), which serves as the basis of an internal image intensification system (a gain of >10/sup 4/) for the observation of the ion beam; the CEMA also acts as a collector for the ion current which is measured by a Keithley 602 electrometer. The ion current is integrated by a simple and inexpensive dosimeter; the electronic circuit for the dosimeter is described. The application of the Faraday cup to the observation and measurement of a 30-keV Ar/sup +/ ion beam is presented as an illustrative example. We have also employed this Faraday cup to observe and measure 30-keV Cr/sup +/, Mo/sup +/, or W/sup +/, and 18-keV Au/sup +/ ion beams employed for the in situ irradiation of field-ion microscope specimens.

• Research Organization: Department of Materials Science and Engineering and the Materials Science Center, Cornell University, Bard Hall, Ithaca, New York 14853
• OSTI ID: 7208580
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 48:12; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430303* -- Particle Accelerators-- Experimental Facilities & Equipment
440101 -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ARGON IONS
ATOMIC IONS
BEAM CURRENTS
BEAM MONITORING
BEAM MONITORS
BEAMS
CHARGED PARTICLES
CHROMIUM IONS
CURRENTS
DESIGN
ELECTRIC MEASURING INSTRUMENTS
ELECTRICAL EQUIPMENT
ELECTRON MULTIPLIER DETECTORS
ENERGY RANGE
EQUIPMENT
FARADAY CUPS
GOLD IONS
ION BEAMS
ION MICROSCOPY
IONS
KEV RANGE
KEV RANGE 10-100
MEASURING INSTRUMENTS
MICROSCOPY
MONITORING
RADIATION DETECTORS
TUNGSTEN IONS