l-band test stations in end station b richard swent
TRANSCRIPT
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L-band test stations in End Station B
Richard Swent
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Modulator and Klystron Testing
• We need to test two modulators and two klystrons for the ILC project
• We are testing 2 modulators designs for reliability and cost-effectiveness
• 2 Klystron designs are being evaluated for reliability and efficiency
• The RF produced will not be used for anything, just measured and dissipated
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2 ILC-class modulators
• One, “Marx”, made at SLAC
• One, “direct switch”, coming from Diversified Technologies (DTI) in Mass.
• Both must meet ILC specs:
• 120 kV at 140 Amps
• 1.7 msec pulses at 5 Hz
• 29 kjoules per pulse
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Station Equipment
• Each test stand has– Modulator w/ Power Supply– Oil Tank with:
• Water Load• Filament Xfmr• Klystron (Vertical now, horizontal later)
– Instrumentation and Controls
• Each test stand will run independently, 24/7, with summary data archived for trends, detailed data for every fault
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End Station B West End
This is the part of End Station B where we will put 2 new test stands.
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Shielding Wall
Removal of the shielding wall is required before any new installation can proceed.
This is what the area looked like at the beginning of 2007.
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Shielding Wall Removal
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Shielding Wall Removal
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Shielding Wall Removal
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Marx Modulator
• Preliminary testing in B015
• Delivery to ESB later this year
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DTI Modulator
• Status unknown—DTI ran out of money before the modulator was completed, and they did not get the follow-on SBIR grant they wanted.
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Klystrons: 2x 5 MW outputs
Toshiba klystronBeing built, will arrive in
October
SLAC Sheet BeamBeing designed, should
arrive in Spring 2008
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Loads and tanks
• Each tank can hold a vertical klystron, a water load, and a filament transformer
• Water loads will be able to take the full output of a modulator in the absence of a klystron
Most tank parts have been received. Some small modifications are needed.
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Water Loads
Old New
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Electrical Power – Phase I
SN
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LCW Phase I
We need 400 gpm of water for two test stands.
Regulator and controls will be outside, with pipes emerging behind the clean room.
Tie-in will occur in early September.
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Floor Plan
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Controls and LLRF
• Commercial instruments have been ordered:– Frequency source– Function generators– Booster amplifiers– Peak power meter (not ordered yet, but soon)
• Custom LLRF hardware is being built, based on existing designs:– IQ modulator– Pulse width controller– RMS detectors
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Schedule
• Wall removal August 2007• Water Cut-In September 2007• Marx Modulator Oct 2007• DTI Modulator ??• Tanks and Water Loads July 2007• Toshiba Klystron Oct 2007• Sheet Beam Klystron Spring 2008