Details

Autor(en) / Beteiligte

• Bazarov, Ivan V.
• Dunham, Bruce M.
• Liu, Xianghong
• Virgo, Matt
• Dabiran, Amir M.
• Hannon, Fay
• Sayed, Hisham

Titel

Thermal emittance and response time measurements of a GaN photocathode

Ist Teil von

• Journal of applied physics, 2009-04, Vol.105 (8), p.083715-083715-4

Ort / Verlag

American Institute of Physics

Erscheinungsjahr

2009

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We present the measurements of thermal emittance and response time for a GaN photocathode illuminated with 5 ps pulses at 260 nm wavelength. The thermal emittance was measured downstream of a 100 kV dc gun using a solenoid scan with a wire scanner and a beam viewscreen and was found to be 1.35 ± 0.11   mm mrad normalized rms emittance per 1 mm rms of illuminated spot size. The response time of the photoemitted electrons was evaluated using a deflecting mode rf cavity synchronized to the laser pulses and was found to be prompt within the time resolution capability of our setup.