Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II...

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Booster High Power RF at PIP-II Era John Reid February 18, 2014

Transcript of Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II...

Page 1: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Booster High Power RF at PIP-II Era

John ReidFebruary 18, 2014

Page 2: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab February 18, 2014J. Reid 2

Scope

• Brief Booster RF System History• Current operating table of parameters• Recently completed upgrades• Additional upgrades schedules for PIP-I• Cavity refurbishment for 15Hz operation RF• Table of parameters for PIP-II era• Possible future upgrades for PIP II • Conclusion

Page 3: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab

Current Booster Parameters 4E12 Protons

Present Booster Present Boosterat Injection - 37.8 MHz at Transition - 52.2MHz

Harmonic Number 84 84Number of Filled Buckets 84 84Injection Energy MeV 400 400Repetition Rate in Hz 15 15Frequency sweep: 37.8MHz -52.8 MHz 37.8MHz -52.8 MHzFrequency Delta F 15MHz 15 MHzAcceleration Ramp Slope: 375 GeV/s 375 GeV/sMaximum cavity Accelerating Voltage: 45 kV/Cavity 50 kV/CavityBeam Intensity: 4.5E12 Protons 4.5E12 ProtonsCavity Q 340 1000Phi S in degrees 0 38.9Cavity Voltage : 45000 50000Cavity Zo ~ : 39.3 39.3Cavity Shut Impedance : 17000 50000Cavity Power Loss per Cavity in watts 59600 25000Cavity R/Q : 50 50Robinson Stable 20.1 1.91Number of RF Stations 19 19Beam Power 270 kWattsBeam Power per Station 14.2 KwattsCavity + Beam Power / Station 39.2 kWatts

February 18, 2014J. Reid 3

Page 4: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab

Current Booster Parameters 4E12 Protons

Present Booster Present Boosterat Injection - 37.8 MHz at Transition - 52.2MHz

Harmonic Number 84 84Number of Filled Buckets 84 84Injection Energy MeV 400 400Repetition Rate in Hz 15 15Frequency sweep: 37.8MHz -52.8 MHz 37.8MHz -52.8 MHzFrequency Delta F 15MHz 15 MHzAcceleration Ramp Slope: 375 GeV/s 375 GeV/sMaximum cavity Accelerating Voltage: 45 kV/Cavity 50 kV/CavityBeam Intensity: 4.5E12 Protons 4.5E12 ProtonsCavity Q 340 1000Phi S in degrees 0 38.9Cavity Voltage : 45000 50000Cavity Zo ~ : 39.3 39.3Cavity Shut Impedance : 17000 50000Cavity Power Loss per Cavity in watts 59600 25000Cavity R/Q : 50 50Robinson Stable 23.1 1.91Number of RF Stations 19 19Beam Power 270 kWattsBeam Power per Station 14.2 KwattsCavity + Beam Power / Station 39.2 kWatts

February 18, 2014J. Reid 4

Page 5: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab February 18, 2014J. Reid 5

Booster Intensity vs Turns

Data taken on May 9, 2012 with 34 ma out of Linac

Page 6: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab

RF System Description• 19 RF stations installed and operational –except during

refurbishment program when only 17 RF cavities at installed.• All stations are upgraded with SS Drivers, newer Modulators,

new 150 kW Power Amplifiers (St 12 [in2001] & St 19 [in 2005]). • RF station consists of Ferrite Bias Supply, Series tube modulator,

150 kW power amplifier, RF cavity, & local station controls. 10 stations in the West Gallery run off one anode supply and 9 stations run off another anode supply in the East Gallery.

• Booster cavity parameters– Frequency sweep – 30 to 52.813 MHz, present sweep 37 to 52.8

MHz– Q at injection (37MHz) ~ 340, Q at extraction (52.8MHz) ~ 1225– Peak accelerating voltage per cavity ~ 50 kvolts

February 18, 2014J. Reid 6

Page 7: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab

Booster Cavity installed in Tunnel with PA

February 18, 2014J. Reid 7

Page 8: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab

New 150 kWatt Power Amplifier

February 18, 2014J. Reid 8

Page 9: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab

Booster Cavity Cross Section

February 18, 2014J. Reid 9

Page 10: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab

Booster Cavity end view

February 14, 2014J. Reid 10

2.25 inch aperture

Page 11: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab

Brief History• Booster rf cavities were modified in the mid to

late 70’s with the following upgrades:– Spark detection system.– Monolithic RF coupling capacitor with metalized

interface to copper spinnings.– Tuners rebuilt using new lower loss ferrite

• Replaced 10 Toshiba M4c21 cores (mu=40) with 10 Toshiba M4D21a cores (mu=20).

• 18 Stackpole C2285 cores (mu-12.5)remain unchanged.– Cavities

• Tuners removed for rebuilding• All components thoroughly cleaned• Electrical joints tin plated• Mode damper mounts add

February 18, 2014J. Reid 11

Page 12: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab

Original Equipment• Modulators

– Relics of the past, outdated from day one. Use technology from the 50’s.– Very few PC boards, mostly point to point wiring.– Use a number of glass vacuum tubes, some getting harder to find.

• Ferrite Bias Supplies– Replaced original Ling power supplies with FNAL design units in the

early to mid 70’s due to Ling power supply poor pulsing performance.

• Power Amplifiers– Consist of three sections

• 6 water cooled 4CW800F tubes - distributed amplifier – last ~9-12 months• 14 water cooled 4CW800F tubes - Cascode ampllifier – last ~9-12 months• 1 water cooled Y-567B tube – Power module – last ~ 36 months

– Typical repair time for Booster Power amplifier is ~ 60 man hours

February 18, 2014J. Reid 12

Page 13: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab

Upgraded Booster RF Station - Typical

February 18, 2014J. Reid 13

Page 14: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab February 18, 2014J. Reid 14

Additional Booster RF Upgrades - PIP

• Anode Power Supplies– Two new power supplies to replace original 1970 power supplies

• Includes new 13.8kV Step Start VCB contactors• New 2MVA transformers• New outdoor DC Cabinets with HV components• New controls• Completion in FY15-FY16

• Ferrite Bias Supplies– Replace marginal Main Rectifier Transformer & SCR packages in 10 West Gallery

Supplies– Project stated and scheduled to be complete in FY16– Completion does not limit prior15 Hz operation

• Build 3 new Booster Cavities with slightly larger aperture 3.25”– Would install cavities for Booster Stations 21 and 22.

Page 15: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab February 18, 2018J. Reid 15

Cavity Refurbishment

• Completed 9 of 19 cavities with the 9th being installed today.• On going learning process as additional problems arise.• Takes about 8-10 weeks per cavity for refurbishment.• Some cavities are more radioactive than others (upstream cavities

are the most radioactive) with a number of them class 3.• Rebuild tuners takes the most time.• Have procured additional 200 low mu ferrites and waiting on the

vendor to finalize high mu (mu=20) toroids.

Page 16: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab

PIP – II Parameters

PIP-II ERA PIP - II ERAat Injection - 44.7 MHz at Transition - 52.2MHz

Harmonic Number 84 84Number of Filled Buckets 84 84Injection Energy MeV 800 800Repetition Rate in Hz 15 15Frequency sweep: 44.7 MHz - 52.8 MHz 44.7 MHz - 52.8 MHzFrequency Delta F 8.1 MHz 8.1 MHzAcceleration Ramp Slope: 375 GeV/s 375 GeV/sMaximum cavity Accelerating Voltage: 47.5kV/Cavity 50 kV/CavityBeam Intensity: 6.75E`12 Protons 6.75E`12 ProtonsCavity Q 700 1000Phi S in degrees 0 39.4Cavity Voltage : 47500 50000Cavity Zo ~ : 39.3 39.3Cavity Shut Impedance : 35000 50000Cavity Power Loss per Cavity in watts 32230 25000Cavity R/Q : 50 50Robinson Stable 2.4 1.17Number of RF Stations 19 19Beam Power 405 kWBeam Power per Station 21.3 kWCavity + Beam Power / Station 46.3kW

February 18, 2014J. Reid 16

Page 17: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab February 18, 2014J. Reid 17

Possible Future RF upgrades PIP - II

• Modify existing RF cavity for small tuning range

– Only need 7.5 MHz vs present 23 MHz capability– Reduce tuner loss and increase cavity voltage

• Parallel biased cavity – new design– Designed specifically for PIP-II requirements– Requires R&D + building prototype– R/Q ~ 50

• Perpendicular biased cavity– Designed specifically for PIP-II requirements– Requires R&D + build prototype– Engineering challenge – to provide adequate cooling to the garnets

with reliable operation at the 100kV level.– Possible similarities to SSC low energy cavity with low R/Q.

Page 18: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab February 18, 2014J. Reid 18

Possible Perpendicular Cavity Design

Page 19: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab

Perpendicular Bias Cavity

February 18, 2014J. Reid 19

Page 20: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab

Perpendicular Bias Cavity

February 18, 2014J. Reid 20

Page 21: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab

R&D Program• Define cavity parameters• Review possible cavity designs• Simulations• Make drawings for building prototype• Build prototype• Study measurements of prototype• Install in Booster ring as operational prototype.

February 18, 2018J. Reid 21

Page 22: Booster High Power RF at PIP-II Era - PXIE PIP-II (2).pdf• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback . • Have accelerated 6E12

Fermilab February 18, 2014J. Reid 22

Conclusion

• Present cavities will work for PIP-II era parameters with the addition of direct RF feedback .

• Have accelerated 6E12 protons with present system, close to the 6.75E12 requirements.

• Not ideal cavity for 7.5 MHz frequency sweep.• Possible aperture limitations with the 2.25 bore.• Activation levels could be problematic for maintenance & repairs.• I would recommend a new design cavity be explored to meet the

exact requirements of PIP-II.– Higher single cavity operating voltage with lower losses– Larger aperture– Reuse many if not all of the updated high power RF support system components

which will reduce cost.


800 MeV Injection into Booster in the PIP-II Era David Johnson AD/PIP-II Department October 14, 2014 Beams-doc 4683.

800 MeV Injection into Booster in the PIP-II Era David Johnson AD/PIP-II Department October 14, 2014 Beams-doc 4683.

Fermilab PIP Booster Accelerator RF Cavity Refurbishment · Booster RF Cavity 3 M. Slabaugh | Fermilab PIP Booster Accelerator RF Cavity Refurbishment 4/27/2015 Circa. 1969 bid drawing

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Overview of Booster PIP II upgrades and plans C.Y. Tan for Proton Source group PIP II Collaboration Meeting 03 June 2014.

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PIP-II, LLRF, Quality Control and HW & SW Documentation

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PIP and PIP-II Status and Plans

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Update on FFC Measurements at PIP-II Injector Test€¦ · PIP-II Injector Test Beamline (MEBT V3.1, as of Jan 2018) J.-P. Carneiro et al. | Update on FFC Injector at PIP-II Injector

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Fermi National Accelerator Laboratory July 2020 PIP-II ...PIP-II Particle Accelerator Abundant neutrinos, powerful protons The PIP-II project is an essential upgrade of Fermilab’s

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PIP FY14 PMG W. Pellico 7/8/14 7/8/2014PIP PMG. PIP Activities RIL & Linac – 200MHz RF Power System High Level RF Linac Modulator 7835 Procurement – Accelerator.

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Comprod Pip White Paper - A Market Leader in RF ...

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RF-4E Phantom II Report

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LOW LEVEL RF CONTROL FOR THE PIP-II ACCELERATOR

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CEA Contribution to PIP-II: the LB650 cryomodule

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PIP-II Performance Goals and Summary - PXIEpxie.fnal.gov/PIP-II_CDR/PIP-II_RDR_v0.0_MI_RR_IK.docx · Web viewBeam transport from the end of the SC Linac to the new Booster injection

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