Assessment of thermal loads in the CERN SPS crab cavities cryomodule ¹

Journal Article · 20 July 2017 · Journal of Physics. Conference Series

DOI: https://doi.org/10.1088/1742-6596/874/1/012005 · OSTI ID:1394752

Carra, F. ^[1]; Apeland, J. ^[1]; Calaga, R. ^[1]; Capatina, O. ^[1]; Capelli, T. ^[1]; Verdú-Andrés, S. ^[2]; Zanoni, C. ^[1]

---

1. European Organization for Nuclear Research (CERN), Meyrin (Switzerland)
2. Brookhaven National Lab. (BNL), Upton, NY (United States)

As a part of the HL-LHC upgrade, we designed a cryomodule to host two crab cavities for a first test with protons in the SPS machine. The evaluation of the cryomodule heat loads is essential to dimension the cryogenic infrastructure of the system. The current design features two cryogenic circuits. The first circuit adopts superfluid helium at 2 K to maintain the cavities in the superconducting state. The second circuit, based on helium gas at a temperature between 50 K and 70 K, is connected to the thermal screen, also serving as heat intercept for all the interfaces between the cold mass and the external environment. We present an overview of the heat loads to both circuits, and the combined numerical and analytical estimations. The heat load of each element is detailed for the static and dynamic scenarios, with considerations on the design choices for the thermal optimization of the most critical components.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• Grant/Contract Number: SC0012704; AC02-98CH10886
• OSTI ID: 1394752
• Report Number(s): BNL-114301-2017-JA; R&D Project: KBCH139; KB0202011
• Journal Information: Journal of Physics. Conference Series, Vol. 874; Conference: 8th International Particle Accelerator Conference; Copenhagen, Denmark; 20170514 through 20170519; ISSN 1742-6588
• Publisher: IOP PublishingCopyright Statement
• Country of Publication: United States
• Language: English