Zobrazeno 1 - 10
of 274
pro vyhledávání: '"J Norem"'
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
Abstract Although used in the design and costing of large projects such as linear colliders and fusion tokamaks, the theory of vacuum arcs and gradient limits is not well understood. Almost 120 years after the isolation of vacuum arcs, the exact mech
Externí odkaz:
https://doaj.org/article/27f108ed272d43afa58415d9f58baf2c
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
Scientific Reports
Scientific Reports
Although used in the design and costing of large projects such as linear colliders and fusion tokamaks, the theory of vacuum arcs and gradient limits is not well understood. Almost 120 years after the isolation of vacuum arcs, the exact mechanisms of
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 15, Iss 5, p 053501 (2012)
This paper describes the surface environment of the dense plasma arcs that damage rf accelerators, tokamaks, and other high gradient structures. We simulate the dense, nonideal plasma sheath near a metallic surface using molecular dynamics (MD) to ev
Externí odkaz:
https://doaj.org/article/92688cbad23442a3976990325772b9dc
Autor:
A. Hassanein, Z. Insepov, J. Norem, A. Moretti, Z. Qian, A. Bross, Y. Torun, R. Rimmer, D. Li, M. Zisman, D. N. Seidman, K. E. Yoon
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 9, Iss 6, p 062001 (2006)
We describe a model of damage in rf cavities and show how this damage can limit cavity operation. We first present a review of mechanisms that may or may not affect the ultimate fields that can be obtained in rf cavities, assuming that mechanical str
Externí odkaz:
https://doaj.org/article/bcdb78f2f4b742e58867741497f1b113
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 8, Iss 9, p 099901 (2005)
Externí odkaz:
https://doaj.org/article/4d1965cafe29434ca94302c04a3b56f7
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 8, Iss 7, p 072001 (2005)
We have measured the effects of high (0–4.5 T) magnetic fields on the operating conditions of 805 MHz accelerating cavities, and discovered that the maximum accelerating gradient drops as a function of the axial magnetic field. While the maximum gr
Externí odkaz:
https://doaj.org/article/0c4fd34f6b134934869e8119bba14ccf
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 6, Iss 8, p 089901 (2003)
Externí odkaz:
https://doaj.org/article/63ed95bc23c44b92935f4ecb2e21602f
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 6, Iss 7, p 072001 (2003)
We present measurements of dark currents and x rays in a six cell 805 MHz cavity, taken as part of an rf development program for muon cooling, which requires high power, high stored energy, low frequency cavities operating in a strong magnetic field.
Externí odkaz:
https://doaj.org/article/0bc51843082248c69839e5f059da583c
Autor:
J. Norem
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 2, Iss 5, p 054001 (1999)
Bent solenoids can transmit charged particle beams while providing momentum dispersion. While less familiar than quadrupole and dipole systems, bent solenoids can produce superficially simple transport lines and large acceptance spectrometers for use
Externí odkaz:
https://doaj.org/article/9f54c9c080e84c2eaf8810152236d91e
Autor:
C. Ankenbrandt, K-Y. Ng, J. Norem, M. Popovic, Z. Qian, L. A. Ahrens, M. Brennan, V. Mane, T. Roser, D. Trbojevic, W. van Asselt
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 1, Iss 3, p 030101 (1998)
The proton driver for the muon collider must produce short pulses of protons in order to facilitate muon cooling and operation with polarized beams. In order to test methods of producing these bunches, we have operated the alternating-gradient synchr
Externí odkaz:
https://doaj.org/article/cd255357731948d59edc61bc7f6eccd6