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Helmholtz-Zentrum Dresden-Rossendorf. The HZDR Program towards a Helmholtz beamline at XFEL. Roland Sauerbrey. Member of the Helmholtz Association Foundation 01.01.1992 (e.V.)

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The hzdr program towards a helmholtz beamline at xfel

Helmholtz-Zentrum Dresden-Rossendorf

The HZDR Program towards a Helmholtz beamline at XFEL

Roland Sauerbrey


Member of the Helmholtz Association

Foundation01.01.1992 (e.V.)

Employeesca. 800 including ca. 260 scientists + 120 doctoral students as well as employees and guest scientists from more than 40 countries

BudgetPublic 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


Research Questions and Large-Scale Facilities

PET Center

Cancer Research

How can cancerous tumors be identified in the early stages and treated effectively?

Radiation Source ELBE Free-Electron-Lasers High-Intensity Laser

High Magnetic Field Laboratory Dresden

Advanced Materials Research

How does matter behave in strong fields and at small dimensions?

Ion Beam Center

Rossendorf Beamline ROBL at the ESRF

Nuclear Safety Research

How can the public and the environment be protected from technical risks?

TOPFLOW Facility


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

Concept:


ELBE Upgrades

Zentrum HSQ

High Intensity Lasers

2010

2011

2012

2013

2014

2015

Center for high power radiation sources @ HZDR



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

PW area

Complemented by running 150TW Ti:Sapphire

laser Draco (upgrade to PW level in progress)


From POLARIS (IOQ Jena) to PEnELOPE (HZDR)

2 × 2 × 2 m3

4 × 2 × 0.1 m³(table top)

(a) pump setup

Brightness: >1MW/cm2/sr

Wavelength: 980 nm

Brightness: ~100kW/cm2/sr

Wavelength: 940 nm

4-pass pumping reduces

reabsorption losses by 75%

(b) laser material

Yb:CaF2

Yb:FP glass

(c) laser material cooling

Repetition rate 1-10Hz

Repetition rate 1/min

Rod design

Slab design

Active Mirrors



Laser-induced vacuum birefringence

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(ω2probe) -> birefringence

phase shift


Resulting ellipticity

phase shift

measurable ellipticity (intensity measurement)

brilliant X-ray probe

high intensity and interaction length

TH. Heinzl, et al.

Opt. Commun. 267, 318 (2006)


Proposed experimental realization

highest intensity

see talk by I. Uschmann


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