Plasma wakefield effects on highcurrent relativistic electron beam transport in the ionfocused regime Gradient B drift transport of high current electron beams

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It has been demonstrated that X-rays alone can be used to pump a 1061 mn Cr,Nd:GSGG laser. Lasing action has been observed when the laser rod absorbs greater than 27 h a d of 2 MeV X-rays. The laser cavity consists of a corner cube and a output mirror with a reflectivity of 67%. The X-rays are delivered in a 20 ns pulse, and laser action is observed several ps after the X-ray pulse. This delay suggests that chromium is important in the laser pumping process since it is known that an excited chromium ion takes about 10 ps to transfer its energy to a neodymium ion.

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