Nondestructive synchronous beam current monitor

Journal Article · Mon Dec 15 00:00:00 EST 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4902903· OSTI ID:22392294

Covo, Michel Kireeff, E-mail: [e-mail] ^[1]

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1. Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720 (United States)

A fast current transformer is mounted after the deflectors of the Berkeley 88-Inch Cyclotron. The measured signal is amplified and connected to the input of a lock-in amplifier. The lock-in amplifier performs a synchronous detection of the signal at the cyclotron second harmonic frequency. The magnitude of the signal detected is calibrated against a Faraday cup and corresponds to the beam intensity. It has exceptional resolution, long term stability, and can measure the beam current leaving the cyclotron as low as 1 nA.

• OSTI ID: 22392294
• Journal Information: Review of Scientific Instruments, Vol. 85, Issue 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BEAM CURRENTS
CYCLOTRONS
DETECTION
FARADAY CUPS
LOCK-IN AMPLIFIERS
RESOLUTION
SIGNALS
STABILITY
TRANSFORMERS