Plasma channel generation for electron acceleration with a laser-induced density gradient
- Title
- Plasma channel generation for electron acceleration with a laser-induced density gradient
- Authors
- JANG, H; KIM, J; YOO, S; HUR, MS; SUK, H; CHO, MH; NAMKUNG, W; 조무현
- Date Issued
- 2007-05
- Publisher
- KOREAN PHYSICAL SOC
- Abstract
- Injection is a critical issue for the generation of a small-energy-spread, high-energy electron beam by using a laser wakefield accelerator (LWFA). By using a steep downward density gradient of plasma electrons at a gas target, a portion of the background electrons can be trapped locally in the laser wakefield, and they are accelerated by the field. To make a steep downward electron density gradient, we generated a pre-plasma using a 200-ps 800-mJ Nd:Glass laser, and we measured its electron density by using a Mach-Zehnder interferometer. Due to the shock structure of the plasma with a background neutral gas, a steep density gradient (similar to 8 x 10(18) cm(-3) /20 mu m) could be generated. In the near future, a 20-TW, 30-fs Ti:Sapphire laser will be sent to this pre-plasma to generate an electron beam. In this paper, some preliminary experimental results and an ongoing work are reported.
- Keywords
- laser accelerator; advanced accelerator; electron beam generation; TERAWATT LASER; WAKE FIELDS; PULSES; TRANSITION; WAKEFIELD; INJECTION
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/23391
- ISSN
- 0374-4884
- Article Type
- Conference
- Files in This Item:
- There are no files associated with this item.
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