Zobrazeno 1 - 10
of 284
pro vyhledávání: '"M. Poelker"'
Autor:
P. A. Adderley, S. Ahmed, T. Allison, R. Bachimanchi, K. Baggett, M. BastaniNejad, B. Bevins, M. Bevins, M. Bickley, R. M. Bodenstein, S. A. Bogacz, M. Bruker, A. Burrill, L. Cardman, J. Creel, Y.-C. Chao, G. Cheng, G. Ciovati, S. Chattopadhyay, J. Clark, W. A. Clemens, G. Croke, E. Daly, G. K. Davis, J. Delayen, S. U. De Silva, M. Diaz, R. Dickson, L. Doolittle, D. Douglas, M. Drury, E. Feldl, J. Fischer, A. Freyberger, V. Ganni, R. L. Geng, C. Ginsburg, J. Gomez, J. Grames, J. Gubeli, J. Guo, F. Hannon, J. Hansknecht, L. Harwood, J. Henry, C. Hernandez-Garcia, T. Hiatt, D. Higinbotham, S. Higgins, A. S. Hofler, J. Hogan, C. Hovater, A. Hutton, C. Jones, K. Jordan, M. Joyce, R. Kazimi, M. Keesee, M. J. Kelley, C. Keppel, A. Kimber, L. King, P. Kjeldsen, P. Kneisel, J. Kowal, G. A. Krafft, G. Lahti, T. Larrieu, R. Lauze, C. Leemann, R. Legg, R. Li, F. Lin, D. Machie, J. Mammosser, K. Macha, K. Mahoney, F. Marhauser, B. Mastracci, J. Matalevich, J. McCarter, M. McCaughan, L. Merminga, R. Michaud, V. Morozov, C. Mounts, J. Musson, R. Nelson, W. Oren, R. B. Overton, G. Palacios-Serrano, H.-K. Park, L. Phillips, S. Philip, F. Pilat, T. Plawski, M. Poelker, P. Powers, T. Powers, J. Preble, T. Reilly, R. Rimmer, C. Reece, H. Robertson, Y. Roblin, C. Rode, T. Satogata, D. J. Seidman, A. Seryi, A. Shabalina, I. Shin, C. Slominski, R. Slominski, M. Spata, D. Spell, J. Spradlin, M. Stirbet, M. L. Stutzman, S. Suhring, K. Surles-Law, R. Suleiman, C. Tennant, H. Tian, D. Turner, M. Tiefenback, O. Trofimova, A.-M. Valente, H. Wang, Y. Wang, K. White, C. Whitlatch, T. Whitlatch, M. Wiseman, M. J. Wissman, G. Wu, S. Yang, B. Yunn, S. Zhang, Y. Zhang
Publikováno v:
Physical Review Accelerators and Beams, Vol 27, Iss 8, p 084802 (2024)
This review paper describes the energy-upgraded Continuous Electron Beam Accelerator Facility (CEBAF) accelerator. This superconducting linac has achieved 12 GeV beam energy by adding 11 new high-performance cryomodules containing 88 superconducting
Externí odkaz:
https://doaj.org/article/18535cc4069449a8acd9f8e55e6964ca
Autor:
Y. Wang, M. A. Mamun, P. Adderley, B. Bullard, J. Grames, J. Hansknecht, C. Hernandez-Garcia, R. Kazimi, G. A. Krafft, G. Palacios-Serrano, M. Poelker, M. L. Stutzman, R. Suleiman, M. Tiefenback, S. Wijethunga, J. Yoskowitz, S. Zhang
Publikováno v:
Physical Review Accelerators and Beams, Vol 23, Iss 10, p 103401 (2020)
Cs_{x}K_{y}Sb photocathodes grown on GaAs and molybdenum substrates were evaluated using a −300 kV dc high voltage photogun and diagnostic beam line. Photocathodes grown on GaAs substrates, with varying antimony layer thickness (estimated range fro
Externí odkaz:
https://doaj.org/article/e0910e99a8f74e3cb3a0b1df6a067092
Autor:
C. Hernandez-Garcia, P. Adderley, B. Bullard, J. Benesch, J. Grames, J. Gubeli, F. Hannon, J. Hansknecht, J. Jordan, R. Kazimi, G. A. Krafft, M. A. Mamun, M. Poelker, M. L. Stutzman, R. Suleiman, M. Tiefenback, Y. Wang, S. Zhang, H. Baumgart, G. Palacios-Serrano, S. Wijethunga, J. Yoskowitz, C. A. Valerio Lizarraga, R. Montoya Soto, A. Canales Ramos
Publikováno v:
Physical Review Accelerators and Beams, Vol 22, Iss 11, p 113401 (2019)
This contribution describes the latest milestones of a multiyear program to build and operate a compact -300 kV dc high voltage photogun with inverted insulator geometry and alkali-antimonide photocathodes. Photocathode thermal emittance measurements
Externí odkaz:
https://doaj.org/article/5ce468f65c254ed394cf952f1e876bb2
Publikováno v:
APL Materials, Vol 3, Iss 6, Pp 066103-066103-7 (2015)
CsK2Sb photocathodes with quantum efficiency on the order of 10% at 532 nm, and lifetime greater than 90 days at low voltage, were successfully manufactured via co-deposition of alkali species emanating from an effusion source. Photocathodes were cha
Externí odkaz:
https://doaj.org/article/3e1cd7c951484d409af2935da4c2619d
Publikováno v:
Physical Review Accelerators and Beams, Vol 20, Iss 10, p 103403 (2017)
Cs_{x}K_{y}Sb photocathodes were manufactured on a niobium substrate and evaluated over a range of temperatures from 300 to 77 K. Vacuum conditions were identified that minimize surface contamination due to gas adsorption when samples were cooled bel
Externí odkaz:
https://doaj.org/article/6fa24e3803f849d0a786946682592554
Autor:
B. Roberts, F. Hannon, M. M. Ali, E. Forman, J. Grames, R. Kazimi, W. Moore, M. Pablo, M. Poelker, A. Sanchez, D. Speirs
Publikováno v:
Physical Review Accelerators and Beams, Vol 19, Iss 5, p 052801 (2016)
A compact, harmonically resonant cavity with fundamental resonant frequency 1497 MHz was used to evaluate the temporal characteristics of electron bunches produced by a 130 kV dc high voltage spin-polarized photoelectron source at the Continuous Elec
Externí odkaz:
https://doaj.org/article/183205510f014bffa4a4652545b5d9ec
Autor:
M. BastaniNejad, Md. Abdullah Mohamed, A. A. Elmustafa, P. Adderley, J. Clark, S. Covert, J. Hansknecht, C. Hernandez-Garcia, M. Poelker, R. Mammei, K. Surles-Law, P. Williams
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 17, Iss 2, p 029901 (2014)
Externí odkaz:
https://doaj.org/article/25972040b54046548b7c1645d43742b6
Autor:
R. R. Mammei, R. Suleiman, J. Feingold, P. A. Adderley, J. Clark, S. Covert, J. Grames, J. Hansknecht, D. Machie, M. Poelker, T. Rao, J. Smedley, J. Walsh, J. L. McCarter, M. Ruiz-Osés
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 16, Iss 3, p 033401 (2013)
Two K_{2}CsSb photocathodes were manufactured at Brookhaven National Lab and delivered to Jefferson Lab within a compact vacuum apparatus at pressure ∼10^{-11} Torr. These photocathodes were evaluated using a dc high voltage photogun biased at volt
Externí odkaz:
https://doaj.org/article/ed284f9f02dd4cd28622e509d54acf83
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 15, Iss 12, p 122802 (2012)
A compact rf cavity was constructed that simultaneously resonates at many harmonic modes when excited by a repetitive bunched electron beam passing through its bore. The excitation of these modes provides a Fourier description of the temporal charact
Externí odkaz:
https://doaj.org/article/2da3942c9dfa4a4eb3cb5b7063e7582c
Autor:
M. BastaniNejad, Md. Abdullah Mohamed, A. A. Elmustafa, P. Adderley, J. Clark, S. Covert, J. Hansknecht, C. Hernandez-Garcia, M. Poelker, R. Mammei, K. Surles-Law, P. Williams
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 15, Iss 8, p 083502 (2012)
The field emission characteristics of niobium electrodes were compared to those of stainless steel electrodes using a DC high voltage field emission test apparatus. A total of eight electrodes were evaluated: two 304 stainless steel electrodes polish
Externí odkaz:
https://doaj.org/article/6a7530e6aa4b47b28aaa3db7b9d8c06f