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A closeup of the XL5 klystron

A closeup of the XL5 klystron

A close-up of the XL5 klystron. Manufactured by CPI, it was brought to SLAC for testing at a unique facility that can power the tube with 400,000-volt pulses. Building its own test facility would have cost the company at least $1 million.

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A cooperative agreement with Palo-Alto based CPI opens the door to routine commercial manufacturing of these powerful vacuum tube devices, which convert electron beams into microwaves that are used to accelerate subatomic particles.

CPI President and Chief Operating Officer Robert A. Fickett, left, and SLAC Lab Director Chi-Chang Kao look at one of the XL5 klystrons the company built under a cooperative agreement with SLAC.