cern x-band test-stand cern - cea – psi – slac high voltage modulator klystron xl5 directional...
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CERN X-band Test-StandCERN X-band Test-Stand
CERN - CEA – PSI – SLAC
High voltage modulator
Klystron XL5
Directional coupler
Circular waveguide =50 mm
SLED Pulse compressor
Mode convertorsRF Valve
Circular pumping port
Status 03/2010
MilestonesMilestones
12.2006 CLIC Frequency change: 30 GHz ► 12 GHz 01.2008 Mandate for 12 GHz test-stand at CERN 10.2008 SLAC WFOA: Design and Production of
klystron 09.2008 “ French White Paper”: Modulator, PC and
RF-Component Supply 12.2008 CERN component review 02.2009 Pulse Compressor order to GYCOM 05.2009 CEA tender for Modulator 09.2009 Modulator contract with Scandinova 12.2009 Start of klystron testing at SLAC
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OrganizationOrganization
CLIC WS October 08
KlystronG.McMonagleG. Rossat
ModulatorCEA &G.McMonagle
WaveguidesG.McMonagleG. Rossat
Pulse CompressorCEA &I.SyratchevK. Schirm
Operation/ControlsM.DraperS. Dobert
Low-level RFJ. MourierL. Timeo
InfrastructureJ.MonteiroK. Schirm
Test-StandG.RiddoneS. DobertK. Schirm
G. McMonagleF. Peauger CEAK. Schirm
KlystronKlystron
KM Schirm BE-RF4
XL5 2AXL5 2A
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XL5 dressingXL5 dressing
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XL5 1A testingXL5 1A testing
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TWT driverTWT driver
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ComponentsComponents
GYCOM
Cooling System
Oil Pumps/Filter
Filament PS Core Bias PS
Primary Power Connections
Control PCB, Sol PS, Vac PS, RF equippment
HVPS, New place
Flow Guards
RF-Valve Courtesy: F. Peauger CEA
Pulse Compressor Courtesy: GYCOM/I. Syratchev
Pulse Compressor Pulse Compressor (GYCOM)(GYCOM)
KM Schirm BE-RF 10
CLIC WS 10/2009 KM Schirm BE-RF 11 1Time (ns)
Output PC power amplitude (MW)
Input PC power amplitude (MW)
Input PC power phase (deg)
Time (ns)
Q0 = 150000
QL = 25000
β=Q0/Qx = 5
Reflexion coef = 0.67
SLED Filling time = 0.663 µs
Phase step of 86 deg (1.5 rad) and linear variation from 86 to 180 deg
Filling SLED: 1.2 µs
Slope phase step: 20 ns
Flat top : 300 ns
120 MW, 300 ns assuming 15% of losses in the RF network
Pulse waveform after SLED compression
Power multiplication factor = 2.75
LL-RFLL-RF
Collaboration Meeting 01/2009 KM Schirm BE-RF12
FlangesFlanges
CLIC WS 10/2009 KM Schirm BE-RF 13
ConclusionConclusion
Delays in the supply of modulator, some RF network components and installation (due to fire)
Klystron performance promising Pulse Compressor needs additional effort Installation will proceed in 3 phases: Power source
commissioning - RF network comm. – Test Stand comm.
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