IPAC2022 - List of Authors (Schramm, U.)

Paper	Title	Page
WEIXSP1	Towards High-Repetition Rate Petawatt Laser Experiments with Cryogenic Jets Using a Mechanical Chopper System	1594
	M. Rehwald, S. Assenbaum, C. Bernert, U. Schramm, K. Zeil HZDR, Dresden, Germany C.B. Curry, M. Gauthier, S.H. Glenzer, C. Schoenwaelder, F. Treffert SLAC, Menlo Park, California, USA S. Göde EuXFEL, Schenefeld, Germany
	Laser-plasma based ion accelerators require suitable high-repetition rate target systems that enable systematic studies at controlled plasma conditions and application-relevant particle flux. Self-refreshing, micrometer-sized cryogenic jets have proven to be an ideal target platform. Yet, operation of such systems in the harsh environmental conditions of high power laser induced plasma experiments have turned out to be challenging. Here we report on recent experiments deploying a cryogenic hydrogen jet as a source of pure proton beams generated with the PW-class ultrashort pulse laser DRACO. Damage to the jet target system during application of full energy laser shots was prevented by implementation of a mechanical chopper system interrupting the direct line of sight between the laser plasma interaction zone and the jet source.
	Slides WEIXSP1 [4.896 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-WEIXSP1
About •	Received ※ 16 May 2022 — Revised ※ 10 June 2022 — Accepted ※ 14 June 2022 — Issue date ※ 15 June 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPOMS020	FAIR SIS100 Laser Cooling Pilot Facility	2284
	S. Klammes, T. Kühl, P.J. Spiller, T. Stöhlker, D.F.A. Winters GSI, Darmstadt, Germany M.H. Bussmann, U. Schramm, M. Siebold HZDR, Dresden, Germany M.H. Bussmann CASUS, Görlitz, Germany J. Gumm, B. Langfeld, T. Walther TU Darmstadt, Darmstadt, Germany V. Hannen, K. Ueberholz Westfälische Wilhelms-Universität Münster, Institut für Kernphysik, Münster, Germany X. Ma, W.Q. Wen IMP/CAS, Lanzhou, People’s Republic of China U. Schramm TU Dresden, Dresden, Germany T. Stöhlker HIJ, Jena, Germany T. Stöhlker IOQ, Jena, Germany T. Walther HFHF, Frankfurt am Main, Germany
	We present new (preliminary) results from a recent (May 2021) beam experiment for laser cooling of bunched relativistic carbon ion beams at the ESR of the GSI Helmholtz Centre in Darmstadt, Germany. We were able to use the new pulsed UV laser system from the TU Darmstadt, which has a very high repetition rate, a variable pulse duration and high UV power (up to 250 mW @ 257 nm). Using this laser, we have - for the first time - demonstrated laser cooling of bunched relativistic ion beams for different laser pulse durations (166-740 ps) at a ~10 MHz repetition rate. In addition, we could use the moveable in-vacuo (X)UV detection system from Münster University to study the fluorescence from the laser-excited ions. Finally, we have observed clear effects in the amount of detected fluorescence from the ions using our new ion bunch - laser pulse timing scheme. These studies are also highly relevant for the SIS100 laser cooling pilot facility, which is currently being realized at FAIR.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-WEPOMS020
About •	Received ※ 08 June 2022 — Revised ※ 11 June 2022 — Accepted ※ 15 June 2022 — Issue date ※ 13 June 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Towards High-Repetition Rate Petawatt Laser Experiments with Cryogenic Jets Using a Mechanical Chopper System

1594

M. Rehwald, S. Assenbaum, C. Bernert, U. Schramm, K. Zeil
HZDR, Dresden, Germany
C.B. Curry, M. Gauthier, S.H. Glenzer, C. Schoenwaelder, F. Treffert
SLAC, Menlo Park, California, USA
S. Göde
EuXFEL, Schenefeld, Germany

Laser-plasma based ion accelerators require suitable high-repetition rate target systems that enable systematic studies at controlled plasma conditions and application-relevant particle flux. Self-refreshing, micrometer-sized cryogenic jets have proven to be an ideal target platform. Yet, operation of such systems in the harsh environmental conditions of high power laser induced plasma experiments have turned out to be challenging. Here we report on recent experiments deploying a cryogenic hydrogen jet as a source of pure proton beams generated with the PW-class ultrashort pulse laser DRACO. Damage to the jet target system during application of full energy laser shots was prevented by implementation of a mechanical chopper system interrupting the direct line of sight between the laser plasma interaction zone and the jet source.

Slides WEIXSP1 [4.896 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-WEIXSP1

About •

Received ※ 16 May 2022 — Revised ※ 10 June 2022 — Accepted ※ 14 June 2022 — Issue date ※ 15 June 2022

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPOMS020

FAIR SIS100 Laser Cooling Pilot Facility

2284

S. Klammes, T. Kühl, P.J. Spiller, T. Stöhlker, D.F.A. Winters
GSI, Darmstadt, Germany
M.H. Bussmann, U. Schramm, M. Siebold
HZDR, Dresden, Germany
M.H. Bussmann
CASUS, Görlitz, Germany
J. Gumm, B. Langfeld, T. Walther
TU Darmstadt, Darmstadt, Germany
V. Hannen, K. Ueberholz
Westfälische Wilhelms-Universität Münster, Institut für Kernphysik, Münster, Germany
X. Ma, W.Q. Wen
IMP/CAS, Lanzhou, People’s Republic of China
U. Schramm
TU Dresden, Dresden, Germany
T. Stöhlker
HIJ, Jena, Germany
T. Stöhlker
IOQ, Jena, Germany
T. Walther
HFHF, Frankfurt am Main, Germany

We present new (preliminary) results from a recent (May 2021) beam experiment for laser cooling of bunched relativistic carbon ion beams at the ESR of the GSI Helmholtz Centre in Darmstadt, Germany. We were able to use the new pulsed UV laser system from the TU Darmstadt, which has a very high repetition rate, a variable pulse duration and high UV power (up to 250 mW @ 257 nm). Using this laser, we have - for the first time - demonstrated laser cooling of bunched relativistic ion beams for different laser pulse durations (166-740 ps) at a ~10 MHz repetition rate. In addition, we could use the moveable in-vacuo (X)UV detection system from Münster University to study the fluorescence from the laser-excited ions. Finally, we have observed clear effects in the amount of detected fluorescence from the ions using our new ion bunch - laser pulse timing scheme. These studies are also highly relevant for the SIS100 laser cooling pilot facility, which is currently being realized at FAIR.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-WEPOMS020

About •

Received ※ 08 June 2022 — Revised ※ 11 June 2022 — Accepted ※ 15 June 2022 — Issue date ※ 13 June 2022

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)