Contribution to a conference proceedings

GSI-2026-00363

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Cryogenic inserts in the room temperature synchrotron SIS18 at GSI

Bozyk, L. (Corresponding author)GSI* ; Spiller, P.GSI*

2025
JACoW Publishing Geneva

Please use a persistent id in citations: doi:10.18429/JACoW-IPAC2025-THPS058  doi:10.18429/JACOW-IPAC2025-THPS058  doi:10.15120/GSI-2026-00363

Abstract: The existing room temperature heavy ion synchrotron SIS18 at GSI will be used as booster for the future SIS100 at FAIR. One of its features the the generation of high intensity heavy ion beams. In order to create such beams, medium charge states are used, which have a lower space charge limit and can be created with less stripping losses. Unfortunately, such heavy ions have very high ionization cross sections in collisions with residual gas particles, yielding in beam loss and subsequent pressure rises via ion impact stimulated gas desorption. Although an extensive upgrade plan, including NEG-coated magnet chambers and an ion-catcher system, has been realized, the required intesity goals will not yet be reached. Simulations including cryogenic surfaces around the ion catchers show, that their high sticking probability prevents from pressure built-ups during operation. A prototype ion catcher, including such cryogenic surfaces cooled by a commercial cold-head has been developed, built, and tested. It has recently been installed in SIS18 and will undergo further tests, including measurements with heavy ion beams. Findings for the operation and further cryogenic inserts are presented.

Keyword(s): Accelerator Physics ; mc7-accelerator-technology-and-sustainability - MC7: Accelerator Technology and Sustainability ; MC7.T14 - MC7.T14 Vacuum Technology

Note: Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 license.

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Contributing Institute(s):

1. Publikationen des Stabes SIS 100 / SIS 18 (SISpub)

Research Program(s):

1. 621 - Accelerator Research and Development (POF4-621) (POF4-621)

Experiment(s):

1. Experiment at GSI without experiment proposal number ( - ; Facility_outside_beam_time_program )

Appears in the scientific report 2025

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