A 200 MHz 35 MW Multiple Beam Klystron for Accelerator Applications Final Report

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Calabazas Creek Research, Inc. (CCR) performed initial development of a compact and reliable 35 MW, multiple beam klystron (MBK) at 200 MHz with a pulse length of 0.125 ms and a 30 Hz repetition rate. The device was targeted for acceleration and ionization cooling of a muon collider, but there are several other potential applications in this frequency range. The klystron uses multiple beams propagating in individual beam tunnels to reduce space charge and allow reduction in the accelerating voltage. This allows a significant reduction in length over a single beam source. More importantly this allows more efficient and less ... continued below

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Ives, R. Lawrence; Read, Michael; Ferguson, Patrick & Marsden, David November 28, 2011.

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Calabazas Creek Research, Inc. (CCR) performed initial development of a compact and reliable 35 MW, multiple beam klystron (MBK) at 200 MHz with a pulse length of 0.125 ms and a 30 Hz repetition rate. The device was targeted for acceleration and ionization cooling of a muon collider, but there are several other potential applications in this frequency range. The klystron uses multiple beams propagating in individual beam tunnels to reduce space charge and allow reduction in the accelerating voltage. This allows a significant reduction in length over a single beam source. More importantly this allows more efficient and less expensive power supplies. At 200 MHz, the interaction circuit for a single beam klystron would be more than six meters long to obtain 50% efficiency and 50 dB gain. This would require a beam voltage of approximately 400 kV and current of 251 A for a microperveance of 1.0. For an eight beam MBK with the same beam perveance, a three meter long interaction circuit achieves the same power and gain. Each beam operates at 142 kV and 70A. The Phase I demonstrated that this device could be fabricated with funding available in a Phase II program and could achieve the program specifications.

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  • Report No.: 001
  • Grant Number: SC0000804
  • DOI: 10.2172/1029944 | External Link
  • Office of Scientific & Technical Information Report Number: 1029944
  • Archival Resource Key: ark:/67531/metadc847059

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  • November 28, 2011

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • Nov. 22, 2016, 1:52 p.m.

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Ives, R. Lawrence; Read, Michael; Ferguson, Patrick & Marsden, David. A 200 MHz 35 MW Multiple Beam Klystron for Accelerator Applications Final Report, report, November 28, 2011; United States. (digital.library.unt.edu/ark:/67531/metadc847059/: accessed September 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.