Direct high power laser diagnostic technique on focused electron bunch

D. Igarashi, T. Takahashi, A. Endo, Masakazu Washio, Kazuyuki Sakaue

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In laser produced plasma (LPP) EUV source, high intensity pulse CO2 laser is essential for plasma generation. To achieve high conversion efficiency and stable EUV power, we would like to measure a laser profile in the interaction point. However, there is no way to measure directly the laser profile of such a high intensity laser at the focus point. Therefore, we have been developing the direct high power laser diagnostic technique based on laser Compton scattering (LCS). LCS signal by using focused electron beam shows 1D laser profile. 2D laser profile can be reconstructed by one-dimensional laser profiles from various angles using computer tomography (CT). This method is suitable for high intensity laser, but very small spot size of electron beam is required. To obtain small spot size, we used S-band Cs-Te photocathode RF-Gun and specially designed solenoid lens at Waseda University. We already succeeded in observing minimum beam size of about 20μm rms and this is adequate to scan the CO2 laser. In this conference, we will report the result of the laser Compton scattering with pulse CO2 laser, the preparatory experiment in measuring a metal wire cross section and the present progresses.

Original languageEnglish
Title of host publicationIPAC 2016 - Proceedings of the 7th International Particle Accelerator Conference
PublisherJoint Accelerator Conferences Website (JACoW)
Pages4073-4075
Number of pages3
ISBN (Electronic)9783954501472
Publication statusPublished - 2016
Event7th International Particle Accelerator Conference, IPAC 2016 - Busan, Korea, Republic of
Duration: 2016 May 82016 May 13

Other

Other7th International Particle Accelerator Conference, IPAC 2016
CountryKorea, Republic of
CityBusan
Period16/5/816/5/13

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Atomic and Molecular Physics, and Optics

Fingerprint Dive into the research topics of 'Direct high power laser diagnostic technique on focused electron bunch'. Together they form a unique fingerprint.

  • Cite this

    Igarashi, D., Takahashi, T., Endo, A., Washio, M., & Sakaue, K. (2016). Direct high power laser diagnostic technique on focused electron bunch. In IPAC 2016 - Proceedings of the 7th International Particle Accelerator Conference (pp. 4073-4075). Joint Accelerator Conferences Website (JACoW).