PIP-II: Goals, Strategy, and Status Paul Derwent 26 February, 2015.

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Presentation transcript:

PIP-II: Goals, Strategy, and Status Paul Derwent 26 February, 2015

Outline Program Goals Design Strategy and Concept R&D Program Project Status and Strategy Future Options Collaboration 2/26/15Paul Derwent2

Motivation Fermilab’s goal is to construct & operate the foremost facility in the world for particle physics research utilizing intense beams. Neutrinos –MINOS+, kW >1-2 MW 10’s kW Muons –Muon kW kW Longer term opportunities  This requires more protons! Ongoing Proton Improvement Plan will support initial goals by establishing a base capability of operating the Booster at a 15 Hz beam rate Paul Derwent 32/26/15

The Fermilab Accelerator Complex ~2016 The Fermilab complex will deliver protons at both 8 and 120 GeV, in support of the neutrino and muon programs: –Booster: 4.2× Hz = 80 kW –MI: 4.9× Hz = 700 kW Limitations –Booster pulses per second (15 Hz) Total power available to 8 GeV program limited by the repetition rate –Booster protons per pulse Limited by space-charge forces at Booster injection, i.e. the linac energy –Reliability Linac/Booster represent a non-negligible operational risk Paul Derwent42/26/15

PIP-II PIP-II builds upon Proton Improvement Plan (PIP) to support long-term physics research goals by providing increased beam power to LBNF, while providing a platform for the future Design Criteria –Deliver >1 MW of proton beam power from the Main Injector over the energy range 60 – 120 GeV, at the start of LBNF operations –Support the current 8 GeV program including Mu2e, g-2, and short- baseline neutrinos –Provide an upgrade path for Mu2e –Provide a platform for extension of beam power to LBNF to >2 MW –Provide a platform for extension of capability to high duty factor/higher beam power operations –At an affordable cost to the US Department of Energy Goal is to initiate operations in newly-configured complex in ~2024 2/26/15Paul Derwent5

PIP-II Strategy Increase Booster/Recycler/Main Injector per pulse intensity by ~50% –Requires increasing the Booster injection energy to ~800 MeV 30% reduction in space-charge tune shift w/ 50% increase in beam intensity Increase Booster repetition rate to 20 Hz –Maintain 1 MW down to 60 GeV or, –Provide factor of 2.5 increase in power to 8 GeV program –Improve slip-stacking efficiency via larger orbit separation Modest modifications to Booster/Recycler/Main Injector –Accommodate higher intensities and higher Booster injection energy  Cost effective solution: 800 MeV superconducting pulsed linac, extendible to support >2 MW operations to LBNF and upgradable to continuous wave (CW) operations –Builds on significant existing infrastructure –Capitalizes on major investment in superconducting RF technologies –Eliminates significant operational risks inherent in existing 400 MeV linac Existing linac removed from service upon completion of PIP-II –Siting consistent with eventual replacement of the Booster as the source of protons for injection into Main Injector Paul Derwent62/26/15

PIP-II Site Layout (provisional) Paul Derwent72/26/15

PIP/PIP-II Performance Goals Performance ParameterPIPPIP-II Linac Beam Energy400800MeV Linac Beam Current252mA Linac Beam Pulse Length msec Linac Pulse Repetition Rate1520Hz Linac Beam Power to Booster413kW Linac Beam Power Capability Duty Factor)4~200kW Mu2e Upgrade Potential (800 MeV)NA>100kW Booster Protons per Pulse4.2× ×10 12 Booster Pulse Repetition Rate1520Hz Booster Beam 8 GeV80160kW Beam Power to 8 GeV Program (max)3280kW Main Injector Protons per Pulse4.9× ×10 13 Main Injector Cycle GeV1.33* sec LBNF Beam GeV0.7* MW LBNF Upgrade GeVNA>2MW Paul Derwent82/26/15 *NOvA operates exclusively at 120 GeV

PIP-II Linac Technology Map Paul Derwent9 SectionFreqEnergy (MeV)Cav/mag/CMType RFQ HWR (  opt =0.11) /8/1HWR, solenoid SSR1 (  opt =0.22) /8/ 2SSR, solenoid SSR2 (  opt =0.51) /21/7SSR, solenoid LB 650 (  G =0.61) /22/115-cell elliptical, doublet* HB 650 (  G =0.9) /8/45-cell elliptical, doublet* *Warm doublets external to cryomodules All components CW-capable  =0.11  =0.22  =0.51  =0.61  = MHz MeV 650 MHz MeV SC MHz MeV LEBTRFQMEBT RT IS 2/26/15

PIP-II R&D Strategy Goal is to mitigate risk: Technical/cost/schedule Technical Risks –Front End (PXIE) Complete systems test: Ion Source through SSR1 (25 MeV) –Operations of (high Q 0 ) sc linac in pulsed mode at low current Primary issue is resonance control in cavities Task force defining options and pursuing development –Booster/Recycler/Main Injector beam intensity 50% per pulse increase over current operations Longitudinal emittance from Booster for slip-stacking Beam loss/activation Cost Risks –Superconducting RF Cavities, cryomodules, RF sources represent 46% of construction costs Goal: Be prepared for a construction start in 2019 Paul Derwent 102/26/15

PXIE (PIP-II Injector Experiment) 2/26/15Paul Derwent11 Collaborators ANL: HWR LBNL:LEBT, RFQ SNS: LEBT BARC, RRCAT, IUAC, VECC: MEBT, SSR1 PXIE will address the address/measure the following: –LEBT pre-chopping –Vacuum management in the LEBT/RFQ region –Validation of chopper performance –Bunch extinction –MEBT beam absorber –MEBT vacuum management –Operation of HWR in close proximity to 10 kW absorber –Operation of SSR with beam, including resonance control and LFD compensation in pulsed operations –Emittance preservation and beam halo formation through the front end 40 m, ~25 MeV 30 keV RFQ MEBT HWRSSR1 HEBT LEBT 2.1 MeV 10 MeV 25 MeV Now 2018

PXIE Current Configuration IS and LEBT installed and commissioned with beam –Beam characterized at RFQ entrance (emittance scanner) –CW/pulsed (400  sec x 10 Hz) 5 mA Emittance =0.13/0.12 mm-mrad Consistent with RFQ requirements 2/26/15Paul Derwent12

PXIE Current Configuration 2/26/15Paul Derwent13 DCCT Emittance Scanner Isolated diaphragm #2 Ceramic break (for toroid) Gate valve Turbo pump Ion Source

SRF R&D Paul Derwent14 HWR SSR1 SSR2 LB650 HB650 2/26/15

SRF Development Status ( ) 2/26/15Paul Derwent15

Integrated (Fermilab + IIFC) R&D Schedule 2/10-13/15S. Holmes |DOE Institutional Review16 Successful completion will require assignment of adequate resources and close coordination between all IIFC institutions.

R&D Deliverables 2/10-13/15S. Holmes |DOE Institutional Review17 DeliverableDate New Dates Comments Reference Design ReportQ1FY15 HB650 Cavity (8, TESLA shape) Vertical Test (US)Q4FY15 Integrated Horizontal Test Stand Delivered from India Q1CY17 Cryostat+RF System HB650 Dressed Cavity (3) Horizontal Test (US)Q4FY16 Q4CY17 HB650 Dressed Cavity (4) Horizontal Test (India)Q2FY17 Q4CY17 LB650 Dressed Cavity (3) Horizontal Test (US)Q3FY17 Q2CY18 LB650 Dressed Cavity (2) Horizontal Test (India)Q3FY17 Q2CY18 HB650 Cryomodule Design (US, India)Q2FY16 Q3CY16 HB650 Cryomodule Power Test (US)Q4FY17 Q4CY MHz/30 kW rf Power Test (India)Q4FY15 Q1CY16 SSR1 Dressed Cavity (2) Horizontal Test (India)Q4FY15 Do we want to do this? SSR1 Cryomodule Power Test (U.S.)Q3FY17 Q2CY17 SSR2 Dressed Cavity (2) Horizontal Test (India)Q2FY17 Q1CY18 SSR2 Cavity (2) Vertical Test (US)Q4FY17 Q1CY18 SSR2 Dressed Cavity (1) Horizontal Test (US)Q4FY17 Q4CY18 Need Time to Dress 325 MHz/10 kW rf Power Test (India)Q4FY15 Q4CY16 (10 for PXIE) 650 MHz Cryomodule Test Stand (US & India)Q3FY16 Q2CY18 Cryo-feed + RF System 650 MHz 30kw rf Power Sustem (8 for CMTF) Q4CY17 RF System (integrated) HWR Cryomodule Test with BeamQ2FY18 Front End Systems Test (warm components)Q3FY16

PIP-II Project Status and Strategy PIP-II is in the development phase and is not yet recognized as a formal DOE project –However, PIP-II has received very strong support from P5*, DOE/OHEP^, and the Fermilab director –Expect formalization of project status (CD-0) in the next ~year, followed by ~8-year development + construction period Goals for FY2015 –Release PIP-II Reference Design Report –Update current cost estimate as necessary –Start developing a resource loaded schedule –Receive RFQ (from LBNL) and initiate commissioning at PXIE –Keep HWR and SSR1 fabrication on schedule –Develop deliverables strategy with India (and Europe) –Support DOE/OHEP in development of Mission Needs Statement –Establish PIP-II Office Paul Derwent182/26/15 *Particle Physics Project Prioritization Panel ^Office of High Energy Physics

PIP-II Collaboration Organized as a “national project with international participation” –Fermilab as lead laboratory Collaboration MOUs for the development phase (through CD-2) : NationalIIFC ANLORNL/SNS BARC/Mumbai BNLPNNL IUAC/Delhi CornellUTennRRCAT/Indore FermilabTJNAFVECC/Kolkata LBNLSLAC MSUILC/ART NCSU Ongoing contacts with CERN (SPL), Orsay, RAL/FETS (UK), ESS (Sweden) Annual Collaboration Meeting (June 3-4, 2014 at Fermilab) Paul Derwent192/26/15

Indian Institutions – Fermilab Collaboration IIFC established for joint R&D on high intensity superconducting proton accelerators –All major systems covered –Annex I offers the opportunity to extend into the construction phase. Indian delivery to Fermilab of prototype components: –MEBT prototype dipole and quadrupole delivered and accepted; production initiated at BARC –325 MHz/3 kW rf amplifier delivered and tested; identified issues under joint resolution –These components are required in PXIE. –1.3 GHz 5-cell cavity successfully processed and tested, with appropriate feedback to Indian collaborators Guest Engineers: We are currently transitioning 2+ year assignments –6 engineers to be embedded in critical joint development projects  Indian-Fermilab partnership is key to successful completion of the R&D phase and transition to construction 2/26/15Paul Derwent20

Summary Fermilab is committed to establishing LBNF as the leading long-baseline program in the world, with >1 MW at startup PIP-II is a complete, integrated, cost effective concept, that meets this goal –Strongly supported by the U.S. HEP community, the U.S. DOE and the Fermilab Director –Moving toward formal project status later this year The R&D program targets primary technical and cost risks –Undertaken by U.S. and Indian partners Completion of the R&D phase will allow launch of the construction phase with high confidence of success, prior to the end of this decade We anticipate PIP-II will be operational, providing >1MW to LBNF, in ~2024 Paul Derwent212/26/15

Backups Paul Derwent222/26/15

Future Directions The configuration and siting of the PIP-II linac are chosen to provide opportunities for future performance enhancements to the Fermilab proton complex –>2 MW to LBNF –100’s kW for a rare processes program CW capability at 0.8 – 3 GeV Muons Kaons Neutrons –Front end for a muon-based facility Paul Derwent232/26/15

Future Directions The strategy for next step(s) beyond PIP-II will be developed in consideration of the following: –Slip-stacking in the Recycler is not possible at intensities beyond PIP-II –The Booster cannot be upgraded to support intensities beyond ~7×10 12 ppp, no matter what the injection energy –A new 8-GeV rapid cycling synchrotron (RCS) could meet the needs of the neutrino program Beam 8 GeV ~600kW Injection energy ~2 GeV –Construction of an RCS may require long-term utilization of the Recycler for proton accumulation –An extension of the PIP-II linac to 6-8 GeV may be required to remove the Recycler from service and/or to achieve the 1-4 MW required to support a muon- based facility The strategy will likely be determined on the basis of programmatic choices once PIP-II construction is underway In all scenarios it will be necessary to extend the PIP-II linac to at least 2 GeV and to retire the existing Booster –Unless realization of “smart RCS” with lower (800 MeV) injection energy Paul Derwent242/26/15

Flexible Platform for the Future Opportunities for Booster replacement include full energy (8 GeV) linac or RCS Paul Derwent252/26/15

N2 Doping for High Q0 N 2 gas introduced during vacuum bake: –Q 0 17 MV/m (!) Single-cell HB650 2K 2/26/15Paul Derwent26

Cryogenic System Required to support 5% cryogenic duty factor –Configuration capable of 10-15% with more pumping –160 – 240 kW beam power at 800 MeV Paul Derwent272/26/15

Example: GeV 2.4 MW requires 1.5×10 14 protons from Main Injector every GeV –Every GeV Accumulation requires either: –Box-car stack (in Recycler) six batches of 2.5×10 13 protons in ≤ 0.6 sec  >10 Hz rep-rate RCS –Or inject a long (linac) pulse containing 1.5×10 14 protons directly into Main Injector –Strategy TBD Paul Derwent282/26/15

GeV Booster is not capable of accelerating 2.5×10 13 no matter what the injection energy, or how it is upgraded: –Requires ~0.1% beam loss –High impedance –Transition crossing –Poor magnetic field quality –Poor vacuum –Inadequate shielding Paul Derwent292/26/15

Possible Parameters for post-PIP-II Complex Paul Derwent30 Proton SourceRCSLinac Particle TypepH-GeV Beam Kinetic Energy8.0 GeV Protons per Pulse2.6× ×10 14 Beam Pulse Length msec Pulse Repetition Rate20 Hz Pulses to Recycler6NA Pulses to Main InjectorNA1 Beam Power at 8 GeV (Total) kW Beam Power to Main Injector*160/280 kW Beam Power Available for 8 GeV Program*500/ /3680kW Main Injector Beam Kinetic Energy*120/60 GeV Main Injector Protons per Pulse1.5×10 14 Main Injector Cycle Time*1.2/0.7 sec LBNF Beam Power*2.4/2.1 MW *First number refers to 120 GeV MI operations; second to 60 GeV 2/26/15

Possible Parameters for post-PIP-II Complex Paul Derwent 312/26/15