A circulating hydrogen ultra-high purification system for the MuCap experiment

V. A. Ganzha; P. A. Kravtsov; O. E. Maev; G. N. Schapkin; G. G. Semenchuk; V. A. Trofimov; A. A. Vasilyev; M. E. Vznuzdaev; S. M. Clayton; P. Kammel; B. Kiburg; M. Hildebrandt; C. Petitjean; T. I. Banks; B. Lauss

doi:10.1016/j.nima.2007.06.010

A circulating hydrogen ultra-high purification system for the MuCap experiment

V. A. Ganzha, P. A. Kravtsov, O. E. Maev, G. N. Schapkin, G. G. Semenchuk, V. A. Trofimov, A. A. Vasilyev, M. E. Vznuzdaev, S. M. Clayton, P. Kammel, B. Kiburg, M. Hildebrandt, C. Petitjean, T. I. Banks, B. Lauss

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

The MuCap experiment is a high-precision measurement of the rate for the basic electroweak process of muon capture, μ^-+p→n+ν_μ. The experimental approach is based on an active target consisting of a time projection chamber (TPC) operating with pure hydrogen gas. The hydrogen has to be kept extremely pure and at a stable pressure. A Circulating Hydrogen Ultra-high Purification System was designed at the Petersburg Nuclear Physics Institute (PNPI) to continuously clean the hydrogen from impurities. The system is based on an adsorption cryo pump to stimulate the hydrogen flow and on a cold adsorbent for the hydrogen cleaning. It was installed at the Paul Scherrer Institute (PSI) in 2004 and performed reliably during three experiment runs. During several months long operating periods the system maintained the hydrogen purity in the detector on the level of 20 ppb for moisture, which is the main contaminant, and of better than 7 and 5 ppb for nitrogen and oxygen, respectively. The pressure inside the TPC was stabilized to within 0.024% of 10 bar at a hydrogen flow rate of three standard liters per minute.

Original language	English (US)
Pages (from-to)	485-497
Number of pages	13
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	578
Issue number	3
DOIs	https://doi.org/10.1016/j.nima.2007.06.010
State	Published - Aug 11 2007
Externally published	Yes

Keywords

Circulation
Cleaning
Detector
Gas
Hydrogen
Mixture
Purification

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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10.1016/j.nima.2007.06.010

Cite this

Ganzha, V. A., Kravtsov, P. A., Maev, O. E., Schapkin, G. N., Semenchuk, G. G., Trofimov, V. A., Vasilyev, A. A., Vznuzdaev, M. E., Clayton, S. M., Kammel, P., Kiburg, B., Hildebrandt, M., Petitjean, C., Banks, T. I., & Lauss, B. (2007). A circulating hydrogen ultra-high purification system for the MuCap experiment. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 578(3), 485-497. https://doi.org/10.1016/j.nima.2007.06.010

A circulating hydrogen ultra-high purification system for the MuCap experiment. / Ganzha, V. A.; Kravtsov, P. A.; Maev, O. E. et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 578, No. 3, 11.08.2007, p. 485-497.

Research output: Contribution to journal › Article › peer-review

Ganzha, VA, Kravtsov, PA, Maev, OE, Schapkin, GN, Semenchuk, GG, Trofimov, VA, Vasilyev, AA, Vznuzdaev, ME, Clayton, SM, Kammel, P, Kiburg, B, Hildebrandt, M, Petitjean, C, Banks, TI & Lauss, B 2007, 'A circulating hydrogen ultra-high purification system for the MuCap experiment', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 578, no. 3, pp. 485-497. https://doi.org/10.1016/j.nima.2007.06.010

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title = "A circulating hydrogen ultra-high purification system for the MuCap experiment",

abstract = "The MuCap experiment is a high-precision measurement of the rate for the basic electroweak process of muon capture, μ-+p→n+νμ. The experimental approach is based on an active target consisting of a time projection chamber (TPC) operating with pure hydrogen gas. The hydrogen has to be kept extremely pure and at a stable pressure. A Circulating Hydrogen Ultra-high Purification System was designed at the Petersburg Nuclear Physics Institute (PNPI) to continuously clean the hydrogen from impurities. The system is based on an adsorption cryo pump to stimulate the hydrogen flow and on a cold adsorbent for the hydrogen cleaning. It was installed at the Paul Scherrer Institute (PSI) in 2004 and performed reliably during three experiment runs. During several months long operating periods the system maintained the hydrogen purity in the detector on the level of 20 ppb for moisture, which is the main contaminant, and of better than 7 and 5 ppb for nitrogen and oxygen, respectively. The pressure inside the TPC was stabilized to within 0.024% of 10 bar at a hydrogen flow rate of three standard liters per minute.",

keywords = "Circulation, Cleaning, Detector, Gas, Hydrogen, Mixture, Purification",

author = "Ganzha, {V. A.} and Kravtsov, {P. A.} and Maev, {O. E.} and Schapkin, {G. N.} and Semenchuk, {G. G.} and Trofimov, {V. A.} and Vasilyev, {A. A.} and Vznuzdaev, {M. E.} and Clayton, {S. M.} and P. Kammel and B. Kiburg and M. Hildebrandt and C. Petitjean and Banks, {T. I.} and B. Lauss",

note = "Funding Information: The authors wish to thank Prof. A. Vorobyov for important design remarks and fruitful discussions. They gratefully acknowledge the help of the Cryogenic and Superconducting Technique Laboratory and G.A. Ganzha of the PNPI during the development of the system; and the help of Dr. F. Mulhauser during installation and experiments at PSI. We are grateful to the whole MuCap collaboration for their support during the runs and the permission to present MuCap data. This work has been supported by the CRDF under Award No. RP2-2414-GA-02, the US National Science Foundation, PSI and a Grant of the President of the Russian Federation (NSH-3057.2006.2). ",

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doi = "10.1016/j.nima.2007.06.010",

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T1 - A circulating hydrogen ultra-high purification system for the MuCap experiment

AU - Ganzha, V. A.

AU - Kravtsov, P. A.

AU - Maev, O. E.

AU - Schapkin, G. N.

AU - Semenchuk, G. G.

AU - Trofimov, V. A.

AU - Vasilyev, A. A.

AU - Vznuzdaev, M. E.

AU - Clayton, S. M.

AU - Kammel, P.

AU - Kiburg, B.

AU - Hildebrandt, M.

AU - Petitjean, C.

AU - Banks, T. I.

AU - Lauss, B.

N1 - Funding Information: The authors wish to thank Prof. A. Vorobyov for important design remarks and fruitful discussions. They gratefully acknowledge the help of the Cryogenic and Superconducting Technique Laboratory and G.A. Ganzha of the PNPI during the development of the system; and the help of Dr. F. Mulhauser during installation and experiments at PSI. We are grateful to the whole MuCap collaboration for their support during the runs and the permission to present MuCap data. This work has been supported by the CRDF under Award No. RP2-2414-GA-02, the US National Science Foundation, PSI and a Grant of the President of the Russian Federation (NSH-3057.2006.2).

PY - 2007/8/11

Y1 - 2007/8/11

N2 - The MuCap experiment is a high-precision measurement of the rate for the basic electroweak process of muon capture, μ-+p→n+νμ. The experimental approach is based on an active target consisting of a time projection chamber (TPC) operating with pure hydrogen gas. The hydrogen has to be kept extremely pure and at a stable pressure. A Circulating Hydrogen Ultra-high Purification System was designed at the Petersburg Nuclear Physics Institute (PNPI) to continuously clean the hydrogen from impurities. The system is based on an adsorption cryo pump to stimulate the hydrogen flow and on a cold adsorbent for the hydrogen cleaning. It was installed at the Paul Scherrer Institute (PSI) in 2004 and performed reliably during three experiment runs. During several months long operating periods the system maintained the hydrogen purity in the detector on the level of 20 ppb for moisture, which is the main contaminant, and of better than 7 and 5 ppb for nitrogen and oxygen, respectively. The pressure inside the TPC was stabilized to within 0.024% of 10 bar at a hydrogen flow rate of three standard liters per minute.

AB - The MuCap experiment is a high-precision measurement of the rate for the basic electroweak process of muon capture, μ-+p→n+νμ. The experimental approach is based on an active target consisting of a time projection chamber (TPC) operating with pure hydrogen gas. The hydrogen has to be kept extremely pure and at a stable pressure. A Circulating Hydrogen Ultra-high Purification System was designed at the Petersburg Nuclear Physics Institute (PNPI) to continuously clean the hydrogen from impurities. The system is based on an adsorption cryo pump to stimulate the hydrogen flow and on a cold adsorbent for the hydrogen cleaning. It was installed at the Paul Scherrer Institute (PSI) in 2004 and performed reliably during three experiment runs. During several months long operating periods the system maintained the hydrogen purity in the detector on the level of 20 ppb for moisture, which is the main contaminant, and of better than 7 and 5 ppb for nitrogen and oxygen, respectively. The pressure inside the TPC was stabilized to within 0.024% of 10 bar at a hydrogen flow rate of three standard liters per minute.

KW - Circulation

KW - Cleaning

KW - Detector

KW - Gas

KW - Hydrogen

KW - Mixture

KW - Purification

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IS - 3

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A circulating hydrogen ultra-high purification system for the MuCap experiment

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Keywords

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