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Plasma production via field ionization.

O'Connell, Caolionn L.

Plasma production via field ionization.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Plasma production via field ionization.
作者:	O'Connell, Caolionn L.
面頁冊數:	103 p.
附註:	Adviser: Robert Siemann.
附註:	Source: Dissertation Abstracts International, Volume: 66-08, Section: B, page: 4292.
Contained By:	Dissertation Abstracts International66-08B.
標題:	Physics, Elementary Particles and High Energy.
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3186366
ISBN:	9780542286421

Plasma production via field ionization.
O'Connell, Caolionn L.

Plasma production via field ionization. - 103 p.

Adviser: Robert Siemann.

Thesis (Ph.D.)--Stanford University, 2005.

Based on the experimental results, the incoming beam ionizes the neutral Li vapor when its peak electric field is approximately 5 GV/m and higher. This electric field translates into a peak charge density of approximately 3 x 1016 cm-3. The experimental conditions are approximated and simulated in a 2-D particle-in-cell code, OOPIC. The code and the data correspond well in terms of the correct threshold conditions and the dependence on the critical beam parameters.

ISBN: 9780542286421Subjects--Topical Terms:

227490
Physics, Elementary Particles and High Energy.

Plasma production via field ionization.
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502 $a Thesis (Ph.D.)--Stanford University, 2005.
520 # $a Based on the experimental results, the incoming beam ionizes the neutral Li vapor when its peak electric field is approximately 5 GV/m and higher. This electric field translates into a peak charge density of approximately 3 x 1016 cm-3. The experimental conditions are approximated and simulated in a 2-D particle-in-cell code, OOPIC. The code and the data correspond well in terms of the correct threshold conditions and the dependence on the critical beam parameters.
520 # $a In addition to the ionization threshold, the field ionization effects are characterized by the beam's energy loss through the Li vapor column due to the plasma wake field production. The peak and average energy loss as a result of wake production and beam propagation through the plasma is compared with simulation results from OOPIC. The simulation code accurately predicts the peak energy loss of the beam, but approximations in the code produce differences between the average energy loss measured and the loss calculated by the simulation.
520 # $a Plasma production via field ionization occurs when an incoming electron beam is sufficiently dense that the electric field associated with the beam ionizes the neutral vapor. Experiments at the Stanford Linear Accelerator Center (SLAC) explore the threshold conditions necessary to induce field ionization in a neutral lithium (Li) vapor. By independently varying the bunch length, transverse spot size or number of electrons per bunch, the radial component of the electric field is controlled to be above or below the threshold for field ionization. A self-ionized plasma is an essential step for the viability of plasma-based accelerators for future high-energy experiments.
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