Hard x-ray emission from intense femtosecond laser-solid target interactions

Liming Chen; Patrick Forget; R. Toth; S. Fourmaux; Jean-Claude Kieffer; Andrzej Krol; Charles C. Chamberlain; Bixue X. Hou; John A. Nees; Gerard A. Mourou

doi:10.1117/12.502299

7 January 2004 Hard x-ray emission from intense femtosecond laser-solid target interactions

Liming Chen, Patrick Forget, R. Toth, S. Fourmaux, Jean-Claude Kieffer, Andrzej Krol, Charles C. Chamberlain, Bixue X. Hou, John A. Nees, Gerard A. Mourou

Author Affiliations +

Proceedings Volume 5196, Laser-Generated and Other Laboratory X-Ray and EUV Sources, Optics, and Applications; (2004) https://doi.org/10.1117/12.502299
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

Hard x-ray (8-100 keV) spectrum emission from plasma produced by femtosecond laser solid target interactions and Kα x-ray conversion efficiency have been studied as a function of laser intensity (10¹⁷ W/cm² ~ 10¹⁹ W/cm²), pulse duration (70 fs ~ 400 fs), laser pulse fluence and laser wavelength (800 nm and 400 nm). The Ag Kα x-ray conversion efficiency produced by a laser pulse at 800 nm with an intensity I = 4x10¹⁸ W/cm² can reach 2x10^-5. We discuss the behavior of Kα conversion efficiency scaling laws as a function of the laser parameters. We found that the Kα x-ray conversion efficiency is more dependent on laser fluence than on pulse duration or laser pulse intensity. The conversion efficiency exhibits a similar value at I ~ 1x10¹⁸ W/cm² when we work with a high contrast laser pulse at 400 nm or with a low contrast laser pulse at 800 nm, but in the first case it presents a higher scaling law. Consequently, the use of 400 nm laser pulses could be an effective method to optimize the Kα x-ray emission via vacuum heating mechanisms.

Citation Download Citation

Liming Chen, Patrick Forget, R. Toth, S. Fourmaux, Jean-Claude Kieffer, Andrzej Krol, Charles C. Chamberlain, Bixue X. Hou, John A. Nees, and Gerard A. Mourou "Hard x-ray emission from intense femtosecond laser-solid target interactions", Proc. SPIE 5196, Laser-Generated and Other Laboratory X-Ray and EUV Sources, Optics, and Applications, (7 January 2004); https://doi.org/10.1117/12.502299

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available