Spectroscopic measurements of argon plasma formation by a high-intensity lithium ion beam

被引：4
|
作者：
Bailey, JE
Chung, HK
Carlson, AL
Cohen, D
Johnson, DJ
Lake, P
MacFarlane, JJ
Wang, P
Welch, DR
机构：
[1] Sandia Natl Labs, Albuquerque, NM 87185 USA
[2] Univ Wisconsin, Fus Technol Inst, Madison, WI 53706 USA
[3] Mission Res Corp, Albuquerque, NM 87106 USA
[4] K Tech Corp, Albuquerque, NM 87110 USA
来源：
PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 04期
关键词：
D O I：
10.1103/PhysRevLett.82.739
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We describe the first measurements of plasma formation by a 20 nsec, 9 MeV, 20 kA/cm(2) Li+3 ion beam injected into 2-Torr argon, conditions similar to inertial-fusion ion-beam transport requirements. A new visible-spectroscopy diagnostic exploits ion-beam-excited Ar II transitions to measure the time-resolved plasma electron density (10(15) cm(-3) - 10(16) cm(-3)) and temperature (1-2 eV) during the initial breakdown phase. Stark broadening and line intensity ratios are used as diagnostics after the plasma forms. Comparisons with computer simulations examine intense-beam effects important for the transport of light- and heavy-ion beams.
引用
收藏
页码：739 / 742
页数：4
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