Terawatt, Joule-Class Pulsed THz Sources from Microchannel Targets

Production of terawatt, joule class THz radiation sources from microchannel targets driven with 100s of joule, picosecond lasers is reported. THz sources of this magnitude are useful for non-linear pumping of matter and for charged particle acceleration and manipulation. Microchannel targets demonstrate increased conversion efficiency compared to planar foil targets, with laser energy to THz energy conversion up to 0.9 percent.Comment: 9 pages, 2 figure