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Development of a Faraday cup fast ion loss detector for keV beam ions

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/1.5111714· OSTI ID:1562299
 [1];  [1];  [1];  [1];  [2];  [2];  [1];  [1];  [1]
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  2. Texas A&M Univ., College Station, TX (United States). Dept. of Nuclear Engineering
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The development and testing of a Faraday cup fast-ion loss detector capable of measuring sub 100 keV particles is documented. Such measurement capabilities play an important role in the assessment of particle confinement of nuclear fusion experiments. The detector is manufactured using thin-film deposition techniques, building upon previous work using discrete foils. This new manufacturing method allows the form factor of the sensor to become that of essentially a microchip. Analysis of the diagnostic response is performed using Monte-Carlo particle simulations. These simulations show peaks in the detector response at 40 and 70 keV. The sensor is then tested in a tunable linear accelerator capable of accelerating protons from 20 to 120 keV. Finally, the detector response was found to be well matched to simulations. Improvements to the design to facilitate robustness are discussed.

Research Organization:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-09CH11466
OSTI ID:
1562299
Alternate ID(s):
OSTI ID: 1560711
Journal Information:
Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 9 Vol. 90; ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (8)

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journal March 2017
Energetic ion distribution resulting from neutral beam injection in tokamaks journal October 1976
A thin film device as a low energy, high flux charged particle spectrometer journal January 2001
Thin foil Faraday collectors as a radiation hard fast lost-ion diagnostic journal March 2003
Design and construction of a fast ion loss Faraday cup array diagnostic for Joint European Torus journal October 2004
Initial results from the lost alpha diagnostics on Joint European Torus journal October 2006
Observation of alpha particle loss from JET plasmas during ion cyclotron resonance frequency heating using a thin foil Faraday cup detector array journal October 2010

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