Paper | Title | Other Keywords | Page |
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WEC3I2 | Mitigation of Space Charge Effects in RHIC and Its Injectors | space-charge, emittance, injection, polarization | 264 |
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Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy The RHIC collider physics program, in particular its polarized proton and low energy heavy ion components, present unique challenges for maintaining collider performance in the presence of space charge effects. Polarized beam performance is especially sensitive to emittance increases, since they decrease both the luminosity and polarization. Operation of the collider with gold beams at sub-injection energies (down to 3.85 GeV/n Au) with space charge tune shifts up to 0.1 required special care to optimize both the ion lifetime and its interaction with the electron-beam cooler. We describe the operational experience in these modes and some of the mitigation efforts. |
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Slides WEC3I2 [10.503 MB] | |||
DOI • | reference for this paper ※ doi:10.18429/JACoW-HB2023-WEC3I2 | ||
About • | Received ※ 29 September 2023 — Revised ※ 08 October 2023 — Accepted ※ 10 October 2023 — Issued ※ 14 October 2023 | ||
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WEC4C1 | Magnetic Alloy Loaded Cavities in J-PARC and CERN | cavity, synchrotron, proton, operation | 316 |
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Funding: This work was supported by JSPS KAKENHI Grant Number 19KK0078 and 18K11930. Magnetic Alloy loaded cavities have been used in seven synchrotrons in J-PARC and CERN. In this paper, we will review variety of the cavity technologies to satisfy the requirements for the beam acceleration, deceleration, manipulation and instability damping. This paper also contains improvements of cavity cores by magnetic annealing scheme, quality control of cores during production, the cooling methods of magnetic alloy cores: direct water cooling and indirect one using copper discs, control of cavity bandwidths from broad to narrow bands, and the ways to drive RF cavities by tube and rad-hard solid-state amplifiers. |
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Slides WEC4C1 [3.371 MB] | |||
DOI • | reference for this paper ※ doi:10.18429/JACoW-HB2023-WEC4C1 | ||
About • | Received ※ 04 October 2023 — Revised ※ 07 October 2023 — Accepted ※ 10 October 2023 — Issued ※ 10 October 2023 | ||
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THBP28 | A Phase Trombone for the Fermilab PIP-II Beam Transfer Line | lattice, linac, injection, collimation | 527 |
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The PIP-II beam transfer line (BTL) transports the beam from the PIP-II Linac to the Booster synchrotron ring. A crucial aspect of the BTL design is the collimation system which play a vital role in removing large ampli-tude particles that may otherwise miss the horizontal and vertical edges of the foil at the point of injection into the Booster. To ensure the effectiveness of the collimators, simulations were conducted to determine optimal place-ment within the BTL. These simulations revealed that precise control of the accumulated phase advances be-tween the collimators and the foil is critical. To achieve fine-tuning of the phase advance, a phase trombone was incorporated within the BTL. This paper presents the design and implementation details of this phase trom-bone | |||
Poster THBP28 [0.798 MB] | |||
DOI • | reference for this paper ※ doi:10.18429/JACoW-HB2023-THBP28 | ||
About • | Received ※ 20 September 2023 — Revised ※ 05 October 2023 — Accepted ※ 11 October 2023 — Issued ※ 30 October 2023 | ||
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THBP50 | Fermilab Main Injector and Recycler Operations in the Megawatt Era | operation, proton, experiment, electron | 607 |
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Significant upgrades to Fermilab¿s accelerator complex have accompanied the development of LBNF and DUNE. These improvements will facilitate 1-MW operation of the NuMI beam for the first time this year through changes to the Recycler slip-stacking procedure and shortening of the Main Injector ramp time. The modifications to the Recycler slip-stacking and effort to reduce the Main Injector ramp time will be discussed. Additionally, details regarding further shortening of the ramp time and the impact on future accelerator operations are presented. | |||
Poster THBP50 [0.923 MB] | |||
DOI • | reference for this paper ※ doi:10.18429/JACoW-HB2023-THBP50 | ||
About • | Received ※ 25 September 2023 — Revised ※ 09 October 2023 — Accepted ※ 12 October 2023 — Issued ※ 12 October 2023 | ||
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THBP55 | Commissioning of NICA Injection Complex | injection, electron, acceleration, operation | 618 |
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The Nuclotron-based Ion Collider fAcility (NICA) is under construction at JINR. The NICA project goal is to provide colliding beams for studies of collisions of heavy fully stripped ions and light p¿lairized ions. The NICA Collider includes two rings with 503 m circumference each and the injection complex. For the heavy ion mode, the injection complex consists of following accelerators: 3.2 MeV/u linac (HILAC), 600 MeV/u (A/Z=6) superconducting booster synchrotron (Booster) and main superconducting synchrotron (Nuclotron) with kinetic energy up to 3.9 GeV/u (A/Z=2.5). The injection complex has been under commissioning for more than 2 years. Its Run IV was carried from October 2022 to February of 2023. It was aimed on the injection complex preparation for the collider operations in the heavy ion mode. Additionally, the slowly extracted 3.9 GeV/u xenon beam was delivered to the BM&N experiment resulting in 250 million events in the detector. The paper discusses main results of the injection complex commissioning and plans for its further development. The beam commissioning of the collider is expected in the 2nd half of 2025. | |||
DOI • | reference for this paper ※ doi:10.18429/JACoW-HB2023-THBP55 | ||
About • | Received ※ 26 September 2023 — Revised ※ 06 October 2023 — Accepted ※ 11 October 2023 — Issued ※ 17 October 2023 | ||
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