A 6 kV arbitrary waveform generator for the Tevatron Electron Lens

Journal Article · Wed Nov 09 00:00:00 EST 2011 · Journal of Instrumentation

DOI:https://doi.org/10.1088/1748-0221/6/11/P11003· OSTI ID:1030724

Pfeffer, H. ^[1]; Saewert, G. ^[1]

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1. Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

This paper reports on a 6 kV modulator built and installed at Fermilab to drive the electron gun anode for the Tevatron Electron Lens (TEL). The TEL was built with the intention of shifting the individual (anti)proton bunch tunes to even out the tune spread among all 36 bunches with the desire of improving Tevatron integrated luminosity. This modulator is essentially a 6 kV arbitrary waveform generator that enables the TEL to define the electron beam intensity on a bunch-by-bunch basis. A voltage waveform is constructed having a 7 μs duration that corresponds to the tune shift requirements of a 12-bunch (anti)proton beam pulse train. This waveform is played out for any one or all three bunch trains in the Tevatron. The programmed waveform voltages transition to different levels at time intervals corresponding to the 395 ns bunch spacing. In addition, complex voltage waveforms can be played out at a sustained rate of 143 kHz over the full 6 kV output range. This paper describes the novel design of the inductive adder topology employing five transformers. It describes the design aspects that minimize switching losses for this multi-kilovolt, high repetition rate and high duty factor application.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1030724
• Report Number(s): FERMILAB-PUB-11-425-AD; arXiv:1209.4921; oai:inspirehep.net:1079721; TRN: US1106034
• Journal Information: Journal of Instrumentation, Vol. 6, Issue 11; ISSN 1748-0221
• Publisher: Institute of Physics (IOP)
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANODES
DESIGN
ELECTRON BEAMS
ELECTRON GUNS
ELECTRONS
FERMILAB
FERMILAB TEVATRON
LUMINOSITY
TOPOLOGY
TRANSFORMERS
WAVE FORMS
accelerators
instrumentation for particle accelerators and storage rings - high energy (linear accelerators
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instrumentation for particle accelerators and storage rings - low energy (linear accelerators
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