Plasma-Wakefield Accelerator Group

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Toward optimization of centrifugal barrel polishing procedure for treatment of niobium cavities

IEEE Transactions on Applied Superconductivity Institute of Electrical and Electronics Engineers 28:4 (2018) 3500105

Authors:

A Prudnikava, Y Tamashevich, A Steirle, K Yanushkevich, Brian Foster

Abstract:

Centrifugal barrel polishing (CBP) is a simple and environmentally friendly method that can be applied for mechanical abrasion of the cavity interior in order to remove the mechanically damaged surface after its production. The CBP recipes described in the literature, however, require CBP to be performed in many stages, require long processing times and nevertheless are unable to provide good cavity RF performance without additional chemical processing. Here, we report new results on characterization of cavity surfaces treated with a typical CBP recipe, including the contamination with abrasive particles, plastic deformation and hydrogen contamination, and critically evaluate it. Methods to reduce the depth of significant plastic deformation as well as the modified commercially viable CBP procedure followed by final electropolishing are proposed and tested on samples.
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Further studies of isolated photon production with a jet in deep inelastic scattering at HERA

JOURNAL OF HIGH ENERGY PHYSICS (2018) ARTN 032

Authors:

H Abramowicz, I Abt, L Adamczyk, M Adamus, R Aggarwal, S Antonelli, V Aushev, Y Aushev, O Behnke, U Behrens, A Bertolin, I Bloch, I Brock, NH Brook, R Brugnera, A Bruni, PJ Bussey, A Caldwell, M Capua, CD Catterall, J Chwastowski, J Ciborowski, R Ciesielski, AM Cooper-Sarkar, M Corradi, RK Dementiev, RCE Devenish, S Dusini, B Foster, G Gach, E Gallo, A Garfagnini, A Geiser, A Gizhko, LK Gladilin, Yu A Golubkov, G Grzelak, M Guzik, C Gwenlan, O Hlushchenko, D Hochman, R Hori, ZA Ibrahim, Y Iga, M Ishitsuka, NZ Jomhari, I Kadenko, S Kananov, U Karshon, P Kaur, D Kisielewska, R Klanner, U Klein, IA Korzhavina, A Kotanski, N Kovalchuk, H Kowalski, B Krupa, O Kuprash, M Kuze, BB Levchenko, A Levy, M Lisovyi, E Lobodzinska, B Loehr, E Lohrmann, A Longhin, O Yu Lukina, J Malka, A Mastroberardino, F Mohamad Idris, N Mohammad Nasir, V Myronenko, K Nagano, Yu Onishchuk, E Paul, W Perlanski, NS Pokrovskiy, A Polini, M Przybycien, M Ruspa, DH Saxon, M Schioppa, U Schneekloth, T Schoerner-Sadenius, LM Shcheglova, O Shkola, Yu Shyrma, IO Skillicorn, W Slominski, A Solano, L Stanco, N Stefaniuk, A Stern, P Stopa, J Sztuk-Dambietz, E Tassi, K Tokushuku, J Tomaszewska, T Tsurugai, M Turcato, O Turkot, T Tymieniecka, A Verbytskyi, WAT Wan Abdullah, K Wichmann, M Wing, S Yamada, Y Yamazaki, AFZ Arnecki, L Zawiejski, O Zenaiev, BO Zhautykov, ZEUS collaboration
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Running of the charm-quark mass from HERA deep-inelastic scattering data

PHYSICS LETTERS B 775 (2017) 233-238

Authors:

A Gizhko, A Geiser, S Moch, I Abt, O Behnke, A Bertolin, J Bluemlein, D Britzger, R Brugnera, A Buniatyan, PJ Bussey, R Carlin, AM Cooper-Sarkar, K Daum, S Dusini, E Elsen, L Favart, J Feltesse, B Foster, A Garfagnini, M Garzelli, J Gayler, D Haidt, J Hladky, AW Jung, M Kapichine, IA Korzhavina, BB Levchenko, K Lipka, M Lisovyi, A Longhin, S Mikocki, Th Naumann, G Nowak, E Paul, R Placakyte, K Rabbertz, S Schmitt, LM Shcheglova, Z Si, H Spiesberger, L Stanco, P Truol, T Tymieniecka, A Verbytskyi, K Wichmann, M Wing, AF Zarnecki, O Zenaiev, Z Zhang
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Studies of the diffractive photoproduction of isolated photons at HERA

PHYSICAL REVIEW D 96:3 (2017) ARTN 032006

Authors:

H Abramowicz, I Abt, L Adamczyk, M Adamus, S Antonelli, V Aushev, Y Aushev, O Behnke, U Behrens, A Bertolin, I Bloch, I Brock, NH Brook, R Brugnera, A Bruni, PJ Bussey, A Caldwell, M Capua, CD Catterall, J Chwastowski, J Ciborowski, R Ciesielski, AM Cooper-Sarkar, M Corradi, RK Dementiev, RCE Devenish, S Dusini, B Foster, G Gach, E Gallo, A Garfagnini, A Geiser, A Gizhko, LK Gladilin, Yu A Golubkov, G Grzelak, M Guzik, C Gwenlan, O Hlushchenko, D Hochman, R Hori, ZA Ibrahim, Y Iga, M Ishitsuka, NZ Jomhari, I Kadenko, S Kananov, U Karshon, P Kaur, D Kisielewska, R Klanner, U Klein, IA Korzhavina, A Kotanski, N Kovalchuk, H Kowalski, B Krupa, O Kuprash, M Kuze, BB Levchenko, A Levy, M Lisovyi, E Lobodzinska, B Loehr, E Lohrmann, A Longhin, O Yu Lukina, J Malka, A Mastroberardino, F Mohamad Idris, N Mohammad Nasir, V Myronenko, K Nagano, Yu Onishchuk, E Paul, W Perlanski, NS Pokrovskiy, A Polini, M Przybycien, M Ruspa, DH Saxon, M Schioppa, U Schneekloth, T Schoerner-Sadenius, LM Shcheglova, O Shkola, Yu Shyrma, IO Skillicorn, W Slominski, A Solano, L Stanco, N Stefaniuk, A Stern, P Stopa, J Sztuk-Dambietz, E Tassi, K Tokushuku, J Tomaszewska, T Tsurugai, M Turcato, O Turkot, T Tymieniecka, A Verbytskyi, WAT Wan Abdullah, K Wichmann, M Wing, S Yamada, Y Yamazaki, AF Zarnecki, L Zawiejski, O Zenaiev, BO Zhautykov, ZEUS Collaboration
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PIP-II injector test’s low energy beam transport: Commissioning and selected measurements

AIP Conference Proceedings AIP Publishing 1869:1 (2017) 050003

Authors:

A Shemyakin, M Alvarez, R Andrews, J-P Carneiro, A Chen, R D’Arcy, B Hanna, L Prost, V Scarpine, C Wiesner
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