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

Abstract

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.

Authors:
 [1];  [1];  [1];  [1];  [1];  [2];  [1]
  1. European Organization for Nuclear Research (CERN), Meyrin (Switzerland)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1394752
Report Number(s):
BNL-114301-2017-JA
Journal ID: ISSN 1742-6588; R&D Project: KBCH139; KB0202011
Grant/Contract Number:
SC0012704; AC02-98CH10886
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Physics. Conference Series
Additional Journal Information:
Journal Volume: 874; Conference: 8th International Particle Accelerator Conference; Copenhagen, Denmark; 20170514 through 20170519; Journal ID: ISSN 1742-6588
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Carra, F., Apeland, J., Calaga, R., Capatina, O., Capelli, T., Verdú-Andrés, S., and Zanoni, C.. Assessment of thermal loads in the CERN SPS crab cavities cryomodule 1. United States: N. p., 2017. Web. doi:10.1088/1742-6596/874/1/012005.
Carra, F., Apeland, J., Calaga, R., Capatina, O., Capelli, T., Verdú-Andrés, S., & Zanoni, C.. Assessment of thermal loads in the CERN SPS crab cavities cryomodule 1. United States. doi:10.1088/1742-6596/874/1/012005.
Carra, F., Apeland, J., Calaga, R., Capatina, O., Capelli, T., Verdú-Andrés, S., and Zanoni, C.. Thu . "Assessment of thermal loads in the CERN SPS crab cavities cryomodule 1". United States. doi:10.1088/1742-6596/874/1/012005. https://www.osti.gov/servlets/purl/1394752.
@article{osti_1394752,
title = {Assessment of thermal loads in the CERN SPS crab cavities cryomodule 1},
author = {Carra, F. and Apeland, J. and Calaga, R. and Capatina, O. and Capelli, T. and Verdú-Andrés, S. and Zanoni, C.},
abstractNote = {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.},
doi = {10.1088/1742-6596/874/1/012005},
journal = {Journal of Physics. Conference Series},
number = ,
volume = 874,
place = {United States},
year = {Thu Jul 20 00:00:00 EDT 2017},
month = {Thu Jul 20 00:00:00 EDT 2017}
}

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