TRC Table 4.1

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Table 4.1
Progress from LC Test Facilities
(December 1995)

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Facility	Constr. Start	Constr. Complete	Tested or to be Tested During Construction	Accomplished or to be Accomplished During Operation	Still to be Done	Other Things to do/ Limitations

SLAC

FFTB	1989	1993	Alignment Stabilization (mechanical and thermal) Spot monitors BPM's	Injected beam with Spot demagnified by 320 to 70 nm Chromatic properties verified Instrumentation and tuning Beam-based alignment developed E144 nonlinear QED observed	Finish systematic alignment and beam studies Nanometer RF-BPM's

ASTA/Test Lab	1992	on-going	50MW klystrons SLED II	1.8 m detuned structure tested to 67 MV/m SLED II tested to 205 MW output	50 MW PPM focused klystron SLED II tested to higher power	75 MW klystron to be developed

ASSET at SLC	1994	1997		1.8 m detuned structure wakefields verified	1.8 m damped/detuned structure wakefields to be measured

NLCTA	1993	1997	Overall assembly of rf system	Not yet started	Injector commissioning Beam loading compensation Beam breakup tests Transverse rf field tests	Two-klystron modulator tests Injector upgrade Blumlein modulator Construction of instruments

KEK

ATF 1.54 GeV Linac & DR	1992	1996	Multibunch generation (20, 2 , 2.8 ns spacing) 33 MV/m with S-band Dual-iris SLED-I S-band choke mode structure Bunch-to-bunch instrumentation Polarized electron gun	Linac loading compensation by -frequency Beam-based tuning in linac and DR Damping by wigglers Double kicker extraction Waveguide-damped rf cavity Multibunch beam dynamics (no. of bunches no. of trains = 10 5 to 60 2) One-stage compressor Positron source test	Final focus test Polarized rf gun Polarized positron source	X-band technologies 90-bunch trains 1.4 ns spacing Full energy positron production

BINP

VLEPP 400 MeV	1992	1997	60 MW klystron 1 MV DC voltage system VPM (rf pulse comprsn.) 1 m structures 5 m submodule of VLEPP	High power test of structure High power test of VPM Alignment Super-precise BPM's Micromovers	120 MW gridded-gun klystrons with PPM focusing Feedback system	X-band technology Single bunch dynamics Cost estimates

CERN-CLIC

CTF1	1989	1995	RF gun photocathode Laser system Short bunch measurement, 30 GHz accel. structures	Demonstration of two-beam principle Generation of 35 nC/b, 76 MW 30 GHz power No 30 GHZ breakdown up to E = 125 MeV/m, (E) = 94 MeV/m in CLIC acc. section Testing 33 GHz BPM & 30 GHz transfer section	Beam loading compensation Bunch compression with trains, obtain 30 nC with = 2 ps

CTF2	1996	1999	New 2.5 cell RF gun 3 GHz accelerating sections adapted to high charges	Not yet started	Beam loading compensation with trains Bunch compression 1 C (48 bunches) 30 GHz reaccel. to 320 MeV Active alignment system Wakefield studies

CESTA	1993	1997		Generation of bunched beam (1 cm spacing)

DESY

SBLC Test Facility 400 MeV	1992	1996	Modulator I tested 150 MW klystrons I & II tested 6m sections with HOM ROBAX-ceramic support Injector design BPM's	Appropriate bunched beam generated with compression to 250 ps Quadrupole vibration feedback successful, with 12 dB attenuation between 1-20 Hz	Beam dynamics of single and multibunch (125) trains with 8, 16, 24 ns spacing (300mA)	Machine too short to study complete effects, filamentation, etc. Need RF pulse shaping to correct beam loading

TESLA Test Facility 500 MeV	1993	1997	Processing steps Fabrication methods Lorentz force control Cryogenics, RF power Injector design	Not yet started	RF/Energy control Cryo heat leak, static, fundamental, HOM Alignment stability Vibration, microphonics High-charge injection Long transv. wakes, single bunch, multibunch Cavity misalignment Cryo procedures warm up / cool down In-situ HPP Dark current, beam losses and radiation	Refine cost estimates of alternate designs for cavity fabrication High-efficiency klystron SMES Modulator TESLA design Overall cost estimates

LBNL

RTA	1995	2002		Not yet started	Cost and efficiency issues in drive-beam generation Beam transport and BBU limits RF production and stability	Performance and efficiency of an extended system

Facility	Constr. Start	Constr. Complete	Tested or to be Tested During Construction	Accomplished or to be Accomplished During Operation	Still to be Done	Other Things to do/ Limitations

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This page modifed: March 31, 1997 - 1 p.m. PST - elm