michail yurkov, the main man for the vuv-fel machine, was visiting our experiment this morning. the said that they do not understand the 2nd harmonic (16nm) radiation, it should not be there. and it can not be controlled or optimized. in contrast, the 3rd harmonic at 11nm is well understood. in the future, we should therefore aim for the 3rd harmonic.
later today, i got a 10 minute lecture of evgeny l. saldin, who invented self-amplified spontaneous emission, sase, at the age of 23 in the early eighties. i am generous enough to share my new expertise.
