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Proposal for LHCMicrowave Schottky
Pickups
Ralph J. Pasquinelli3/9/2005
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LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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Fermilab System Specifications1.75 GHz center frequency100 MHz bandwidthOne Horizontal and Vertical tank each for RR and TeVSingle Sideband Down Conversion preserves chromaticity informationBoth transverse and longitudinal signals from same pickupBi-directional for both protons and pbars from same pickupGating (single or multiple bunch) for proton or pbar signals for TeVGating for hot or cold pbars in RR
LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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Fermilab System CapabilitiesContinuous on line emittance monitor both TeV and RRLongitudinal emittance for RRAbility to measure individual or multiple bunches in TeVAbility ot measure pbars in presence of protons in TeVAbility to measure hot and cold pbars in RRDown conversion utilizing RF source allows monitoring up the TeV RampSingle sideband down conversion allows measuring of chromaticityTune measurement for the TeV & RR Built in calibration system to monitor gain variation with time
LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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Slotted Waveguide Pickup
1.7 GHz 109 x 75 mm aperture
LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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Bunch by Bunch Gate GeneratorAnalog MultiplexerOscilloscopeVector SignalAnalyzerPhase LockedMultiplierEthernetΣΔBPF53 MHz Tevatron RFLPFBPF H or VPickupProtonsAntiprotons Same as above Injection CalibrationSignalΣΔ Closed Circuit TV1.7 GHz38 NS Tevatron Schottky Signal Processing100 1.7 MHz @ GHz5 1.7 MHz @ GHz10 MHzTunnel Service Building Revolution MarkerGating Down Conversion
SSB
LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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Measured Pickup Sensitivity in Recycler
Sum Mode Difference Mode
Directivity Measured at 12-15 dB
LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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Array Assembly
LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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Beam Centering Reduces Common Mode
Recycler Horizontal Pickup 1 x 1011 Protons
LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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Recycler Automated Vector Signal Analyzer Program
Provides momentum spread, tune, revolution frequency, calculated emittance.
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LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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Tevatron Schottky SignalLarge Common Mode Signal Requires High Dynamic Range
LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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Time domain movie of Schottky signal during injection
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LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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Pbar Tune variation through a Tevatron store
Hours
LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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Proton Vertical Schottky up TeV Ramp
LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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Tevatron Proton Schottky Signals
Horizontal
Vertical
E17 Schottky single bunch 19e9 pbars
-126
-125
-124
-123
-122
-121
-120
-119
-118
2211 2216 2221 2226
Frequency MHz
Amplitude dB
Horiz PBAR BUNCH 2919E9 RANGE -27DBM
Vert PBAR BUNCH 2919E9 RANGE -27DBM
LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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Recycler Installation
Tevatron Installation
LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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TevatronSignal ProcessingHardware in E17 service building
LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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Proposed LHC System Specifications4.7 GHz center frequency100 MHz bandwidth minimum allows bunch by bunch gatingOne Horizontal and Vertical tank each LHC ringSingle Sideband Down Conversion preserves chromaticity informationMovable tank for common mode suppressionGating single or multiple bunch
LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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Proposed LHC System CapabilitiesContinuous on line emittance monitorAbility to measure individual or multiple bunchesDown conversion utilizing RF source allows monitoring up the LHC RampNoninvasive Chromaticity measurementsNoninvasive Tune measurement for each ringMeasurement of beam beam tune shiftMeasurement of momentum spreadBuilt in calibration system to monitor gain variation with time
LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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QuickTime™ and aTIFF (LZW) decompressor
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LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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QuickTime™ and aTIFF (LZW) decompressor
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LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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Slotted Waveguide Pickup
4.7 GHz 60 x 60 mm aperture x 1.2 meter long
LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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ΣΔ
H or VPickup
LHC Schottky ProposalTunnel
Single SidbandDown Conversion
BPF BPFLPF
Transmission lineto Service Bldg.
Revolution MarkerBunch by bunch gate generatorDown converter Local Oscillator
Calibration SignalInjection
Vector Signal AnalyzerOscilloscopeMultiplexerControls intefaceClosed Ckt TV
Service Building
Gate
Notes: Red provided by CERN, Black by LARP1. Pickup will be designed by FNALFabricated by CERN. CERN will provide tankstand, motion controls, bake out hardware.2. Fermilab has developed software for measureing beam parameters. This software can be made available to CERN. Fermilab does not intend toport software to CERN control system.
LARP Collaboration R. J. Pasquinelli
LHC Microwave Schottky Pickups
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Working on cost and labor estimate for the designOf the pickup, design and fabrication of theProcessing electronics, travel and commissioning
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