scholarly journals Electric fields, electron production, and electron motion at the stripper foil in the Los Alamos Proton Storage Ring

2002 ◽  
Author(s):  
M. Plum
Keyword(s):  
Electric Fields ◽  
Storage Ring ◽  
Electron Motion ◽  
Los Alamos ◽  
Electron Production ◽  
Stripper Foil

scholarly journals Status report on the Los Alamos proton storage ring

1988 ◽  
Author(s):  
Eugene Colton ◽  
D. Neuffer ◽  
H. A. Thiessen ◽  
H. Butler ◽  
G. R. Swain ◽  
...  
Keyword(s):  
Storage Ring ◽  
Status Report ◽  
Los Alamos

scholarly journals Active damping of the e-p instability at the Los Alamos Proton Storage Ring

2007 ◽  
Vol 102 (12) ◽  
pp. 124904 ◽  
Author(s):  
R. J. Macek ◽  
S. Assadi ◽  
J. M. Byrd ◽  
C. E. Deibele ◽  
S. D. Henderson ◽  
...  
Keyword(s):  
Storage Ring ◽  
Active Damping ◽  
Los Alamos

NUMERICAL SIMULATION OF STREAMER PROPAGATION IN OXYGEN

2008 ◽  
Vol 22 (03) ◽  
pp. 293-307 ◽  
Author(s):  
A. SETTAOUTI ◽  
L. SETTAOUTI
Keyword(s):  
Numerical Simulation ◽  
Space Charge ◽  
Electric Fields ◽  
Negative Ion ◽  
Electron Motion ◽  
Ion Distribution ◽  
Temporal Space ◽  
Glow Discharges ◽  
The Poisson Equation ◽  
Streamer Propagation

Glow discharges are being used in many fields of application. For the improvement of performance in these applications, it is necessary to understand discharge dynamics experimentally and numerically. In this paper, a Monte Carlo simulation is carried out in oxygen ( O 2) in uniform electric fields. The electron motion and avalanche growth are simulated by tracing individual paths, and the technique also accounts for the effect of the rapid spatial and temporal space charge variations by solving the Poisson equation. The streamer propagation, electron, positive and negative-ion distribution, and space charge fields are studied in detail as time increases.

scholarly journals Los Alamos Proton Storage Ring Extraction System

1981 ◽  
Vol 28 (3) ◽  
pp. 2791-2793 ◽  
Author(s):  
Daniel W. Hudgings ◽  
Andrew J. Jason
Keyword(s):  
Storage Ring ◽  
Extraction System ◽  
Los Alamos

Timing with PMTs

2017 ◽  
Author(s):  
A. G. Wright
Keyword(s):  
Monte Carlo ◽  
Field Strength ◽  
Monte Carlo Simulations ◽  
Field Gradient ◽  
Electric Fields ◽  
Electrode Spacing ◽  
Electron Motion ◽  
Zero Crossing ◽  
Time Dispersion ◽  
Initial Electron Energy

The timing capability of photomultipliers (PMTs) can be inferred from the basic laws of electron motion. The relationships between time dispersion and field strength, initial electron energy, angle of emission, and electrode spacing follow from these laws. For conventional PMTs, the major contribution to dispersion arises from the cathode-to-first-dynode region. The field gradient at the cathode primarily determines the timing. This is verified by examining the electron motion in non-uniform electric fields. The contribution from interdynode transitions is small for linear focussed PMTs. Monte Carlo simulations of output waveforms from scintillators agree with measurements. The performance of threshold, zero crossing, and constant fraction (CF) discriminators is examined, revealing the superiority of the CF types. Two organizations have made detailed timing measurements, some of which show sub-nanosecond jitter. Proximity focussed PMTs from Hamamatsu confirm time dispersion measured in picoseconds.

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