| Bibliographic Citation | |
| Full Text |  611 K |
|---|---|
| Title | Progress in understanding and improving X-ray lasers |
| Creator/Author | Nilsen, J. ; Moreno, J.C. ; Koch, J.A. ; Scofield, J.H. ; MacGowan, B.J. ; DaSilva, L.B. |
| Publication Date | 1994 Jan 11 |
| OSTI Identifier | OSTI ID: 10130348; Legacy ID: DE94006048 |
| Report Number(s) | UCRL-JC--116080; CONF-931237--6 |
| DOE Contract Number | W-7405-ENG-48 |
| Other Number(s) | Other: ON: DE94006048 |
| Resource Type | Conference |
| Specific Type | Technical Report |
| Resource Relation | Conference: LASERS `93: international conference on lasers and applications,Lake Tahoe, NV (United States),6-10 Dec 1993; Other Information: PBD: 11 Jan 1994 |
| Research Org | Lawrence Livermore National Lab., CA (United States) |
| Sponsoring Org | USDOE, Washington, DC (United States) |
| Subject | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 42 ENGINEERING; X-RAY LASERS; MODIFICATIONS; PULSE TECHNIQUES; NOVA FACILITY; LASER TARGETS |
| Description/Abstract | We discuss the use of a prepulse technique to achieve lasing in low-Z neon-like ions on the 3p {yields} 3s(J = 0 {yields} 1) transition. In neon-like titanium(Z=22), chromium(Z=24), iron(Z=26), nickel(Z=28), zinc(Z=30), and germanium(Z=32) this transition lases at 326, 285, 255, 231, 212 and 196 {Angstrom} respectively. We present results using this technique on selenium(Z=34) and show how the J = 0 {yields} 1 transition at 182 {Angstrom} suddenly becomes a strong line. The observation that the low-Z ions with odd Z have not lased lead us to investigate the potential impact of hyperfine splitting on the laser gain. In our experiments we measure the lineshape of the 3p {yields} 3s(J = 0 {yields} 1) transition in neon-like niobium and zirconium and observe a 28 m{Angstrom} splitting between the two largest hyperfine components in the niobium(Z=41) line at 145.9 in good agreement with theory. In zirconium(Z=40), no splitting is observed since the hyperfine effect is proportional to the nuclear moment, and the principal isotopes of zirconium have zero nuclear moment, as is typical for even-Z elements. Finally we discuss the use of low density foams for the laser target and present results which show lasing in zirconium aerogel with an initial density of 90 mg/cm{sup 3}. |
| Country of Publication | United States |
| Language | English |
| Format | Medium: ED; Size: 7 p. |
| Availability | OSTI as DE94006048; Paper copy available at OSTI: phone, 865-576-8401, or email, reports@adonis.osti.gov To purchase this media from NTIS, click here |
| System Entry Date | 2008 Feb 12 |
| Document Discussions | |
Top | |
Last Updated: 05/14/2009