New hardware and setupsNew hardware and setupsNew short pulse regimeNew short pulse regime

Experimental resultsExperimental resultsTW powerTW power

Future plans on laser development Future plans on laser development

ATF CO2 LASER progress

Vitaly YakimenkoVitaly YakimenkoAccelerator Test Facility, BNLAccelerator Test Facility, BNL

Until 2004, operated at the 180 ps 50 GW level.

The relatively long pulse duration was due to a narrow bandwidth of a preamplifier.

A 10-atm preamplifier acquired at the end of 2003 allowed upgrade to 30 ps 0.5 TW reported at User Meeting

In 2004, we continued upgrade of the front end picosecond pulse generator and achieved 10 ps 1 TW regime

In 2005 New oscillator was installed - better stability

Next steps : 3-ps (1 year) and 1-0.5 ps (3-4 years) upgrades.

CO2 laser status and prospects

Completed upgrade of the ATF CO2 laserto TW peak power

regenerative

Kerr generator 10 ps

Improved stability and reliabilityHigher repetition rate

New oscillator Installed in December2005

regenerative amplifier final amplifier

Pulse length 10-180 ps 10 ps (3ps -0.5 ps)

Energy 10 mJ 10 J

Repetition rate 1 Hz 1 / 20 Hz (limited by power supply)

Peak power 3 GW 1 TW (>1 TW)

Focal spot () 30 m (~10 m)

Laser strength (a0) 0.8 (>3)

Demonstrated and prospective CO2 laser performance

Nonlinear Thomson scattering experiment

Nonlinear orders

NOVA Laser

Electron interacting with a strong EM wave acquires energy

where - dimensionless laser strength parameter.

Thus, CO2 laser (=10 m) produces 100 times higher particle yield per 1

Joule to compare with presently used solid state lasers (1 m)

provided that a threshold condition is

reached.…..can be replaced with a compact TW, 10 J, 10 Hz CO2 laser.

A PW, kJ solid state laser delivering one shot per several hours…..

222amcW

cmeEa

22 100 mTWPL

1.5 meters

Ultra-fast CO2 laser technology opens new prospects for laser-driven ion sources

Prospective ion acceleration experiment at ATF

User community for the dream beams need to grow

C. Joshi, LINAC2004