Large Radial Shifts in the EIC Hadron Storage Ring

Peggs, S.; Berg, J. Scott; Deitrick, Kirsten; Drees, K. A.; Gamage, Bamunuvita; Gu, X.; Liu, Chuyu; Lovelace, Henry; Luo, Y.; Marr, G.; Marusic, A.; Méot, F.; Michnoff, R.; Ptitsyn, V.; Robert‐Demolaize, G.; Valette, Matthieu; Verdú-Andrés, Silvia

doi:10.18429/jacow-ipac2021-tupab042

Cited by 2 publications

(3 citation statements)

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“…Featuring shorter bunches than RHIC [1] and large radial offsets for certain beam energies [2], the EIC hadron beams would produce an unacceptable heating on the current stainless steel RHIC beampipe. The solution adopted is to install a low impedance beam screen in the beampipes of the RHIC SC magnets [3].…”

Section: Motivation and Requirementsmentioning

confidence: 99%

FELICIA - A probe to survey the RHIC magnet beampipe diameter for EIC beam screen insertion

Micolon,

Bellon,

Gallagher

et al. 2024

J. Phys.: Conf. Ser.

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The Electron Ion Collider (EIC) Hadron Storage Ring (HSR) will reuse many of the existing superconducting (SC) magnets of the RHIC storage rings. To comply with the beamline vacuum requirements in more demanding operational scenarios, the beampipe of the RHIC SC magnets will be equipped with low surface impedance, low secondary electron yield (SEY) beam screens. The installation of these beam screens will be done with the SC magnets as installed today, thus making it a critical operation for a timely EIC installation. The beam screen inner dimensions must be maximized to retain enough aperture to the beam. On the other hand, keeping enough clearance between the screen and the beampipe is critical to ensure a smooth beam screen installation. A survey probe was designed and built to measure the inner diameter of several RHIC SC magnets in-situ and provide critical data for the beam screen design optimization. This paper reports on the design of the probe and the results from the survey campaign.

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Section: Motivation and Requirementsmentioning

confidence: 99%

FELICIA - A probe to survey the RHIC magnet beampipe diameter for EIC beam screen insertion

Micolon,

Bellon,

Gallagher

et al. 2024

J. Phys.: Conf. Ser.

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“…1). In this design, the BPM pickups are mounted at a 30° angle relative to the horizontal plane to avoid excessive heating when the beam is offset transversely [2]. The 316L BPM pick-ups will be copper plated to reduce heating by beam wall image current resistive heating.…”

Section: System Design and Integrationmentioning

confidence: 99%

“…Featuring shorter particle bunches than RHIC [1] and large radial offsets for certain beam energies [2], the EIC hadron beams would produce an excessive voltage on the existing RHIC stripline BPMs. This would lead to high heating of the BPM module and its cryogenic signal cables [3].…”

Section: Introductionmentioning

confidence: 99%

Thermal Engineering of the Cryogenic Beam Position Monitors for the EIC Hadron Storage Ring

Micolon,

Bellon,

Chiechi

et al. 2024

IOP Conf. Ser.: Mater. Sci. Eng.

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The Electron Ion Collider (EIC) Hadron Storage Ring (HSR) will reuse most of the existing superconducting magnets from the RHIC storage ring. However, the existing stripline beam position monitors (BPM) used for RHIC will not be compatible with the planned EIC hadron beam parameters that include higher intensity, shorter bunches, and some operational scenarios with large radial offsets of the beam in the vacuum chamber. To address these challenges, the existing RHIC stripline BPMs will be decommissioned, and a new BPM design using button pick-ups integrated in a new vacuum interconnect/bellows assembly will be installed adjacent to the decommissioned BPMs. A dedicated analysis of the new BPM housing and button pick-up design has been conducted to assess the thermal effects caused by heat conduction, beam induced resistive wall heating and the RF heating from the BPM signal propagation through the cryogenic cables. This paper reports on the thermal design and analysis results to quantify the heat transfer and temperature distribution that can be expected on the new HSR cryogenic BPM.

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Large Radial Shifts in the EIC Hadron Storage Ring

Cited by 2 publications

References 0 publications

FELICIA - A probe to survey the RHIC magnet beampipe diameter for EIC beam screen insertion

FELICIA - A probe to survey the RHIC magnet beampipe diameter for EIC beam screen insertion

Thermal Engineering of the Cryogenic Beam Position Monitors for the EIC Hadron Storage Ring

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