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Test results of the LQXFA/B02 and LQXFA/B03 cryo-assemblies for the High Luminosity LHC upgrade
Authors:
G. Chlachidze,
G. Ambrosio,
M. Anerella,
G. Apollinari,
M. Baldini,
J. DiMarco,
S. Feher,
P. Ferracin,
V. Nikolic,
F. Nobrega,
C. Orozco,
D. Orris,
S. Prestemon,
R. Rabehl,
S. Stoynev,
A. Vouris
Abstract:
The US High-Luminosity LHC Accelerator Upgrade Project (AUP) is responsible for delivering cryo-assemblies for the Q1/Q3 quadrupole optical components of the High Luminosity LHC upgrade at CERN. Total of 10 cryo-assemblies containing two Nb3Sn quadrupole magnets per cold mass will be delivered within this program. After the successful test of the first pre-series cryo-assembly in 2023, two more cr…
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The US High-Luminosity LHC Accelerator Upgrade Project (AUP) is responsible for delivering cryo-assemblies for the Q1/Q3 quadrupole optical components of the High Luminosity LHC upgrade at CERN. Total of 10 cryo-assemblies containing two Nb3Sn quadrupole magnets per cold mass will be delivered within this program. After the successful test of the first pre-series cryo-assembly in 2023, two more cryo-assemblies were tested at Fermilab's horizontal test facility. Production overview and the test results of the LQXFA/B02 and LQXFA/B03 cryo-assemblies are summarized in this paper. After the first test, to increase the capability of the horizontal test facility, various improvements have been made. These improvements are also described in this paper.
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Submitted 17 September, 2025;
originally announced September 2025.
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Quench Performance of the First Pre-series AUP Cryo-assembly
Authors:
M. Baldini,
G. Chlachidze,
G. Apollinari,
J. Dimarco,
S. Feher,
V. Nikolic,
D. Orris,
R. Rabehl,
S. Stoynev,
T. Strauss,
M. Tartaglia,
A. Vouris
Abstract:
The High Luminosity upgrade of the Large Hadron Collider (HL-LHC) at CERN will include eight cryo-assemblies that are expected to be fabricated and delivered to CERN by the US HL-LHC Accelerator Upgrade Project (AUP) as part of the U.S. contributions to the HL-LHC. These cryostat assemblies are the quadrupole magnetic components of the HL-LHC Q1 and Q3 inner triplet optical elements in front of th…
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The High Luminosity upgrade of the Large Hadron Collider (HL-LHC) at CERN will include eight cryo-assemblies that are expected to be fabricated and delivered to CERN by the US HL-LHC Accelerator Upgrade Project (AUP) as part of the U.S. contributions to the HL-LHC. These cryostat assemblies are the quadrupole magnetic components of the HL-LHC Q1 and Q3 inner triplet optical elements in front of the two interaction points. Each cryo-assembly consists of two 4.2 m long Nb3Sn quadrupole magnets with aperture 150 mm and operating gradient 132.6 T/m. The first pre-series cryo-assembly has been fabricated and successfully tested at the horizontal test facility at Fermi National Accelerator Laboratory. In this manuscript we report the quench test results of the LQXFA/B-01 cryo-assembly. The primary objective of the horizontal test is full cryo-assembly qualification and validation of the performance requirements.
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Submitted 29 February, 2024;
originally announced March 2024.
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Mu2e Technical Design Report
Authors:
L. Bartoszek,
E. Barnes,
J. P. Miller,
J. Mott,
A. Palladino,
J. Quirk,
B. L. Roberts,
J. Crnkovic,
V. Polychronakos,
V. Tishchenko,
P. Yamin,
C. -h. Cheng,
B. Echenard,
K. Flood,
D. G. Hitlin,
J. H. Kim,
T. S. Miyashita,
F. C. Porter,
M. Röhrken,
J. Trevor,
R. -Y. Zhu,
E. Heckmaier,
T. I. Kang,
G. Lim,
W. Molzon
, et al. (238 additional authors not shown)
Abstract:
The Mu2e experiment at Fermilab will search for charged lepton flavor violation via the coherent conversion process mu- N --> e- N with a sensitivity approximately four orders of magnitude better than the current world's best limits for this process. The experiment's sensitivity offers discovery potential over a wide array of new physics models and probes mass scales well beyond the reach of the L…
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The Mu2e experiment at Fermilab will search for charged lepton flavor violation via the coherent conversion process mu- N --> e- N with a sensitivity approximately four orders of magnitude better than the current world's best limits for this process. The experiment's sensitivity offers discovery potential over a wide array of new physics models and probes mass scales well beyond the reach of the LHC. We describe herein the preliminary design of the proposed Mu2e experiment. This document was created in partial fulfillment of the requirements necessary to obtain DOE CD-2 approval.
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Submitted 16 March, 2015; v1 submitted 21 January, 2015;
originally announced January 2015.
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Mu2e Conceptual Design Report
Authors:
The Mu2e Project,
Collaboration,
:,
R. J. Abrams,
D. Alezander,
G. Ambrosio,
N. Andreev,
C. M. Ankenbrandt,
D. M. Asner,
D. Arnold,
A. Artikov,
E. Barnes,
L. Bartoszek,
R. H. Bernstein,
K. Biery,
V. Biliyar,
R. Bonicalzi,
R. Bossert,
M. Bowden,
J. Brandt,
D. N. Brown,
J. Budagov,
M. Buehler,
A. Burov,
R. Carcagno
, et al. (203 additional authors not shown)
Abstract:
Mu2e at Fermilab will search for charged lepton flavor violation via the coherent conversion process mu- N --> e- N with a sensitivity approximately four orders of magnitude better than the current world's best limits for this process. The experiment's sensitivity offers discovery potential over a wide array of new physics models and probes mass scales well beyond the reach of the LHC. We describe…
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Mu2e at Fermilab will search for charged lepton flavor violation via the coherent conversion process mu- N --> e- N with a sensitivity approximately four orders of magnitude better than the current world's best limits for this process. The experiment's sensitivity offers discovery potential over a wide array of new physics models and probes mass scales well beyond the reach of the LHC. We describe herein the conceptual design of the proposed Mu2e experiment. This document was created in partial fulfillment of the requirements necessary to obtain DOE CD-1 approval, which was granted July 11, 2012.
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Submitted 29 November, 2012;
originally announced November 2012.
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Commissioning of the cryogenics of the LHC long straight sections
Authors:
A. Perin,
J. Casas-Cubillos,
S. Claudet,
C. Darve,
G. Ferlin,
F. Millet,
C. Parente,
R. Rabehl,
M. Soubiran,
R. van Weelderen,
U. Wagner
Abstract:
The LHC is made of eight circular arcs interspaced with eight Long Straight Sections (LSS). Most powering interfaces to the LHC are located in these sections where the particle beams are focused and shaped for collision, cleaning and acceleration. The LSSs are constituted of several unique cryogenic devices and systems like electrical feed-boxes, standalone superconducting magnets, superconducting…
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The LHC is made of eight circular arcs interspaced with eight Long Straight Sections (LSS). Most powering interfaces to the LHC are located in these sections where the particle beams are focused and shaped for collision, cleaning and acceleration. The LSSs are constituted of several unique cryogenic devices and systems like electrical feed-boxes, standalone superconducting magnets, superconducting links, RF cavities and final focusing superconducting magnets. This paper presents the cryogenic commissioning and the main results obtained during the first operation of the LHC Long Straight Sections.
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Submitted 30 July, 2012;
originally announced July 2012.