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A 500 V Fast Switch For ProjectX 200 Ohm Chopper

Document #:
Project X-doc-1058-v1
Document type:
technical note
Submitted by:
Daniil Frolov
Updated by:
Daniil Frolov
Document Created:
24 May 2012, 15:37
Contents Revised:
24 May 2012, 15:37
Metadata Revised:
24 May 2012, 15:37
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The ProjectX chopper (kicker) will deflect part of the 162.5 MHz beam towards an absorber. The 200 Ohm traveling wave electrostatic kicker design approach allows lowing power dissipation in the driver, kicker and load by the factor of 4, compared to a 50 Ohm structure. The chopper is made from two 200 Ohm helical microstrip lines that are facing each other. This structure should be driven by at least 500 V pulses. Due to the 6.15 ns spacing between the centers of bunches, leading and falling edge rise times of driver pulses should be not more than 2 ns. The length of pulses should be adjustable from 3 ns to units of microseconds. This paper describes the prototype of a switch intended to meet described specifications.
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