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PIP-II Injector Test High Energy Beam Transport Final Design Review

This document outlines the agenda and scope of the final design review for the PIP-II Injector Test (PIP2IT) High Energy Beam Transport (HEBT). It includes an introduction to PIP-II, the goals of PIP2IT, and an overview of the HEBT beam line design. The review focuses on the vacuum design, beam line mechanical design, and planned diagnostics. The document also provides an overview of the PIP-II project and the PIP2IT enclosure at CMTF. The status of PIP2IT and the scope and limitations of the review are also discussed.

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PIP-II Injector Test High Energy Beam Transport Final Design Review

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  1. Lionel PROST Final Design Review for the PIP-II Injector Test High Energy Beam Transport 13 February 2019 PIP2IT HEBT Final Design ReviewIntroduction

  2. Outline • Agenda • Introduction to PIP-II and PIP-II Injector Test (PIP2IT) • Charge & scope • Scope limitations • Team L. Prost | PIP2IT HEBT FDR | Introduction

  3. Agenda • Introduction (Lionel) • Introduction to PIP-II and PIP2IT • Charge and scope of the review • HEBT beam line overview (Sasha) • PIP2IT in its final configuration • HEBT specifications and scheme • HEBT in operation • Measurement intended to be carried out • Vacuum design (Alex) • Configuration • MolFlow+ simulation • Vacuum protection result • Beam line mechanical design (Rich) • Main components status • Plan for installation • Plan for diagnostics (Vic) • List of existing diagnostics • Performance at high energy L. Prost | PIP2IT HEBT FDR | Introduction

  4. Proton Improvement Plan-II (PIP-II) • Upgrades to Fermilab’s accelerator complex • Central part: 800 MeV, 2 mA (average over ~ms) CW-compatible H- Superconducting Linac and transfer line to Booster • Present ‘warm’ Linac: 400 MeV, 30 mA, 40 ms×15 Hz • MW-class accelerator with multi-user operation capability • Platform for future upgrades • Higher Main Injectorpower, multiple experimentssimultaneously Linac Muon rings Booster PIP2 linac and transfer line Layout of PIP-II and its possible future upgrades L. Prost | PIP2IT HEBT FDR | Introduction

  5. PIP-II Injector Test (PIP2IT) • A test accelerator representing the PIP-II front end PIP2IT ~160 m PIP-II Linac scheme 30 keV 2.1 MeV 10 MeV 22 MeV RFQ MEBT HWR protoSSR1 HEBT IS LEBT Warm front end IS = Ion Source; LEBT = Low Energy Beam Transport; RFQ = Radio Frequency Quadrupole; MEBT = Medium Energy Beam Transport; HWR = Half-Wave Resonator; protoSSR1 = prototype Single Spoke Resonator; HEBT = High Energy Beam Transport L. Prost | PIP2IT HEBT FDR | Introduction

  6. PIP2IT at CMTF PIP2IT enclosure HEBT HWR Ion Source HV & LV cabinets MEBT RFQ protoSSR1 MEBT Beam dump in “dog house” L. Prost | PIP2IT HEBT FDR | Introduction

  7. PIP2IT High-level goals • Demonstrate critical technologies for the PIP2 project and integrate lessons learned into the final designs • Gain experience with installation, integrated testing, and operation of PIP2IT equipment, in particular SRF/RF systems and, develop and validate procedures • Avoid creating problems that would delay or make difficult the future conversion of the PIP2IT cave into a PIP-II cryomodule test facility (e.g. activation of large components) • Commission HWR and SSR1 cryomodules with beam • Short (~6 months) run  Anticipate longer commissioningrun when installed in the PIP-II Building High-Bay High Energy Beam Transport line L. Prost | PIP2IT HEBT FDR | Introduction

  8. PIP2IT Status • Warm Front-End (WFE) complete • Demonstrated capability of delivering beam with properties consistent with those defined in the PIP-II PDR (last run  May’18) • Shutdown to prepare the cave for accommodating 2 cryomodules • Cryogenic Transfer Line (CTL) installation near completion • HWR and protoSSR1 cryomodules are being fabricated/assembled • Outfitting of the PIP2IT cave is on-going • First cryomodule (HWR): ~End of April 2019 • Start of cryomodule RF testing (w/o beam) in the summer • Spring 2020: beam to HEBT HEBT RFQ MEBT LEBT IS protoSSR1 HWR L. Prost | PIP2IT HEBT FDR | Introduction

  9. Scope of the review • Review the HEBT “as a whole” and comment on the rationale that lead to the proposed scheme • Assess the vacuum design of the beam line • Protection of cryomodules against vacuum incidents • Examine the choice of diagnostics proposed to carry out measurements listed in Ref. [2] of the charge • Energy, current, transmission efficiency through 2 cryomodules • Beam position • Transverse & longitudinal emittances • Transversephase-spacedistributions • Bunch extinction L. Prost | PIP2IT HEBT FDR | Introduction

  10. Context & constraints • The HEBT is a temporary beam line and will not be part of the PIP-II linac • The HEBT should use as much existing equipment as possible • The focusing and steering elements to be used are those destined for the PIP-II MEBT • Beam instrumentation used in the MEBT, and not part of its final configuration, will be relocated in the HEBT, if found adequate for measuring the beam properties after acceleration to 20‑25 MeV • The HEBT will use the “SNS dump” as its high-power dump • The HEBT beam optics design should emphasize (passively) preventing tight focusing of the beam at the location of the beam dump L. Prost | PIP2IT HEBT FDR | Introduction

  11. Review scope limitations • Does not include the design of the diagnostics proper • Radiation-related issues are not part of this review • Radiation Shielding Assessment is being developed for the entire cave, which includes the shielding ofthe beam dump (a.k.a. dog house) • Mitigation by running with lower dutyfactor and/or overall running time • Continuous monitoring of radiationlevel near the beam line to ensurelow level of residual radiation • Accesses into the cave willrequire a RWP • Dump will remain in dog house untilits residual radiation level becomeswithin mandatory limits for handling Residual radiation after 1 day of cooling, in mrem/hr. L. Prost | PIP2IT HEBT FDR | Introduction

  12. Charge • Main questions: • Is the optics design sufficiently mature to satisfy the specifications [1]? • Is the design sufficiently optimized to conduct the measurements listed in Ref. [2]? • Does the design appropriately address concerns about controlling the power density deposited into the beam dump (and avoiding damaging the dump)? • Is the vacuum design likely to meet the performance expectations? • Is the vacuum protection scheme adequate in order to protect the upstream cryomodules from irreparable damages in case of a failure (e.g. joint failure between the beam tube and the beam dump)? • Are the measures in place to prevent contamination of the superconducting surfaces adequate? • Have installation issues been adequately addressed? L. Prost | PIP2IT HEBT FDR | Introduction

  13. Design team • Matrixed across AD & TD departments • Optics and general layout • A. Shemyakin, A. Saini • Vacuum and vacuum protection • A. Chen, R. Andrews • Beam line components, stands, dog house (i.e. beam dump rad shielding) • R. Andrews, C. Baffes, S. Wesseln, T. Hamerla • Diagnostics • V. Scarpine, A. Shemyakin • Drafting • S. Wesseln • Radiation estimation • J.-P. Carneiro L. Prost | PIP2IT HEBT FDR | Introduction

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