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

QuickTime™ and aTIFF (LZW) decompressor

are needed to see this picture.

QuickTime™ and aTIFF (LZW) decompressor

are needed to see this picture.

LARP Collaboration R. J. Pasquinelli

LHC Microwave Schottky Pickups

QuickTime™ and aTIFF (LZW) decompressor

are needed to see this picture.

QuickTime™ and aTIFF (LZW) decompressor

are needed to see this picture.

LARP Collaboration R. J. Pasquinelli

LHC Microwave Schottky Pickups

QuickTime™ and aTIFF (LZW) decompressor

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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