REDEL, T and EBERLEIN, J and TKOTZ, R and HARTMANN, W and STETTER, M and STARK, R and FRANK, K and CHRISTIANSEN, J (1992) SCHLIEREN DIAGNOSTICS OF PULSED ELECTRON-BEAM ABLATION OF POLYMETHYL-METHACRYLATE. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 54 (6). pp. 520-522. ISSN 0947-8396,
Full text not available from this repository.Abstract
The investigation of the interaction of pulsed electron beams with PMMA (polymethyl-methacrylate) targets is reported. The electron beam of some 10(-8) s in duration is produced in a pulsed low-pressure gas discharge. The beam power density of up to 10(8) W/cm2 leads to a surface plasma formation similar to that of the pulsed laser ablation process. The propagation of the ablated material and the shock wave inside the PMMA target are observed by means of Schlieren diagnostics. An electron density gradient of over 3 X 10(19) cm-4 has been observed in the expanding plasma up to 1.5-mu-s after the plasma formation. During the early stage of expansion, the expansion velocity of the plasma plume as determined by the steep electron density gradient is around 10(5) cm/s. The pressure behind the shock front inside the PMMA target as determined from the shock velocity exceeds 0.3 Gpa.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FILMS; |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:44 |
| URI: | https://pred.uni-regensburg.de/id/eprint/54505 |
Actions (login required)
 |
View Item |
