prof. dr. dr. h. c. r. sauerbrey | scientific director | the hzdr program towards a helmholtz...
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Prof. Dr. Dr. h. c. R. Sauerbrey | Scientific Director | www.hzdr.de
The HZDR Program towards a Helmholtz beamline at XFEL
Roland Sauerbrey
Helmholtz-Zentrum Dresden-Rossendorf
Prof. Dr. Dr. h. c. R. Sauerbrey | Scientific Director | www.hzdr.de
Member of the Helmholtz Association
Foundation 01.01.1992 (e.V.)
Employees ca. 800including ca. 260 scientists + 120 doctoral students
as well as employees and guest scientists from more than
40 countries
Budget Public funding (2011) ca. 84 Mio. €Saxon investment program ca. 70 Mio.
€(2010 - 2014)Third-party funding and other sources ca. 20 Mio.
€
HZDR – Facts and Figures
Prof. Dr. Dr. h. c. R. Sauerbrey | Scientific Director | www.hzdr.de
Ion Beam Center
Radiation Source ELBE Free-Electron-Lasers High-Intensity Laser
Rossendorf Beamline ROBL at the ESRF
TOPFLOW Facility
High Magnetic Field Laboratory Dresden
PET Center
Advanced Materials ResearchHow does matter behave in strong fields and at small dimensions?
Nuclear Safety ResearchHow can the public and the environment be protected from technical risks?
Cancer ResearchHow can cancerous tumors be identified in the early stages and treated effectively?
Research Questions and Large-Scale Facilities
Prof. Dr. Dr. h. c. R. Sauerbrey | Scientific Director | www.hzdr.de
Concept:Unique combination of:
high-power high-brilliance CW electron beams, synchronized with high rep-rate, ultra-high intensity lasers.
Development of:new radiation sources, in unique combinations, enablingstudy of matter under extreme conditions & in new regimes.
Will constitute a prototype for future facilities:National Center for Radiation Research in Oncology-Dresden, and Helmholtz beamline at XFEL, or FAIR.
Center for high power radiation sources @ HZDR
Prof. Dr. Dr. h. c. R. Sauerbrey | Scientific Director | www.hzdr.de
20112010 2012 2013 2014 2015
ELBE Upgrades
High
Inte
nsity
Las
ers
Zentrum HSQ
Center for high power radiation sources @ HZDR
Prof. Dr. Dr. h. c. R. Sauerbrey | Scientific Director | www.hzdr.de
Center for high power radiation sources
Prof. Dr. Dr. h. c. R. Sauerbrey | Scientific Director | www.hzdr.de
PW area
Petawatt, Energy-Efficient Laser for Optical Plasma Experiments
Development of a 2nd generation directly diode laser pumped short pulse PW laser (design: 150J in 150fs, >1Hz rep. Rate, active medium Yb:CaF2 discs ) based on the 1st generation project POLARIS at IOQ Jena
Complemented by running 150TW Ti:Sapphirelaser Draco (upgrade to PW level in progress)
Prof. Dr. Dr. h. c. R. Sauerbrey | Scientific Director | www.hzdr.de
2 × 2 × 2 m34 × 2 × 0.1 m³ (table top)
(a) pump setup
4-pass pumping reducesreabsorption losses by 75%
(c) laser material cooling
Rod design Slab design Active Mirrors
Repetition rate 1/minRepetition rate 1-10Hz
(b) laser material
Brightness: ~100kW/cm2/srWavelength: 940 nm
Brightness: >1MW/cm2/srWavelength: 980 nm
Yb:FP glass Yb:CaF2
From POLARIS (IOQ Jena) to PEnELOPE (HZDR)
Prof. Dr. Dr. h. c. R. Sauerbrey | Scientific Director | www.hzdr.de
effects and problems to be investigated:
- de form ation of ligh t cone, b ire fringence, polarization e ffects - nonpertubative Q FT in strong laser fie lds - photon-photon scatte ring - e lectron-positron pa ir creation (in vacuum ), ...
Avetiss ian [14 ]: 10 W /cmP opov [15 ]: 10 W /cm
2
27 2
18
e -
e +
n
absorptive: pair production
Nonlinear QED
Prof. Dr. Dr. h. c. R. Sauerbrey | Scientific Director | www.hzdr.de
cprobeprobe I
Idn
d
15
42
QED regime:
• small photon energy (compared to mec2)
• highest intensity (yet low compared to Ic=4·1029W/cm2)
dispersive effect (vacuum polarization) calculated in lowest non-trivial order O(I) and O(ω2
probe) -> birefringence
phase shift
Laser-induced vacuum birefringence
Prof. Dr. Dr. h. c. R. Sauerbrey | Scientific Director | www.hzdr.de
cprobeprobe I
Idn
d
15
42phase shift
Resulting ellipticity
measurable ellipticity (intensity measurement)
2
0222 ~2/~
cprobe I
Iz
brilliant X-ray probe high intensity and interaction length
TH. Heinzl, et al.
Opt. Commun. 267, 318 (2006)
Prof. Dr. Dr. h. c. R. Sauerbrey | Scientific Director | www.hzdr.de
Proposed experimental realization
highest intensity
see talk by I. Uschmann
Prof. Dr. Dr. h. c. R. Sauerbrey | Scientific Director | www.hzdr.de