Intense electron-beam transport in the ion-focused regime through the collision-dominated regime
- Sandia National Labs., Albuquerque, NM (United States)
- Mission Research Corp., Albuquerque, NM (United States)
- Ktech Corp., Albuquerque, NM (United States)
This paper reviews the transport of the 19-MeV, 700-kA, 25-ns Hermes-III electron beam in long gas cells filled with N{sub 2} gas spanning six decades in pressure from 10{sup 3} to {approximately}10{sup 3} Torr. We show through measurements and theoretical analyses that the beam has two windows of stable transport: a low-pressure window (between {approximately}1 and {approximately}100 mTorr) that is dominated by propagation in the semi-collisionless IFR (ion-focused regime), and a high-pressure window (between {approximately}1 and {approximately}100 Torr) that is dominated by propagation in the resistive CDR (collision-dominated regime). In the CDR, 79{plus_minus}1.5% of the beam energy is transported over 11 m at 20 Torr. In the IFR, we show that intense radiation fields with controllable rise times and pulse widths can be generated on axis at a bremsstrahlung target. In summary, the measurements and analyses presented here provide a quantitative description of the Hermes-III beam transport over six decades in pressure.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 10160447
- Report Number(s):
- SAND-93-1969C; CONF-940634-3; ON: DE94013826; TRN: 94:012279
- Resource Relation:
- Conference: 10. international conference on high power particle beams,San Diego, CA (United States),20-24 Jun 1994; Other Information: PBD: [1993]
- Country of Publication:
- United States
- Language:
- English
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