Second generation SLAC modulator
The Stanford Linear Accelerator Laboratory has undertaken the construction of a single pass electron-positron collider. In order to reach required beam energy 235 new klystrons needed upgraded modulator systems. The collider will use 50 GeV electrons and positrons. The increase in accelerator energy from the present 30 GeV necessitates the replacement of existing 35 MW klystrons with new 67 MW units. The doubling of klystron output power required a redesign of the modulator system. The 67 MW klystron needs a 350 kV beam voltage pulse with a 3.7 ..mu..s pulse width. A new pulse transformer was designed to deliver the increased voltage and pulse width. Pulse cable design was evaluated to obtain increased reliability of that critical element. The modulator, with the exception of its power supply, was rebuilt to produce the required power increase while enhancing reliability and improving maintainability. An investigation of present thyratron switch tube performance under the new operating conditions resulted in agitation and some warranted panic but these conditions were mitigated after several successful experiments and some evolutionary narrowing of the klystron pulse width. The discussion will cover the upgraded modulator system specifications and some details of the new pulse transformer tank, pulse cable, modulator, and modulator switch tube.
- Research Organization:
- Stanford Linear Accelerator Center, Menlo Park, CA (USA)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 5580919
- Report Number(s):
- SLAC-PUB-3993; CONF-860674-10; ON: DE86013502
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
430300* -- Particle Accelerators-- Auxiliaries & Components
ACCELERATOR FACILITIES
ACCELERATORS
CABLES
CONDUCTOR DEVICES
DESIGN
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
ELECTRON TUBES
ELECTRONIC EQUIPMENT
EQUIPMENT
FUNCTION GENERATORS
GAS DISCHARGE TUBES
HIGH-VOLTAGE PULSE GENERATORS
KLYSTRONS
LINEAR ACCELERATORS
MICROWAVE EQUIPMENT
MICROWAVE TUBES
MODIFICATIONS
OPERATION
PRODUCTION
PULSE GENERATORS
STANFORD LINEAR COLLIDER
THYRATRONS
TRANSFORMERS