TY - GEN
T1 - Photoemission studies on BNL/AES/JLAB all niobium, superconducting RF injector
AU - Rao, T.
AU - Ben-Zvi, I.
AU - Burrill, A.
AU - Hahn, H.
AU - Kayran, D.
AU - Zhao, Y.
AU - Kneisel, P.
AU - Cole, M.
PY - 2005
Y1 - 2005
N2 - Photoelectrons from an all niobium superconducting injector have been generated for the first time. QE of 2×10-6 at 266 nm and 2×10-5 at 248 nm, maximum charge of 10 nC in 10 ns and charge/cycle of 0.8 nC were measured. The lower QE observed after laser cleaning, compared to the room temperature measurements, is attributed to the long distance between the cathode and the closest ion pump and the possibility of the laser ablated material adsorbed back onto the cathode surface at cryogenic temperature. No cavity quenching has been observed even at the maximum laser energy of 3 mJ, maximum repetition rate of 250 Hz and maximum charge of 10 nC from the cathode.
AB - Photoelectrons from an all niobium superconducting injector have been generated for the first time. QE of 2×10-6 at 266 nm and 2×10-5 at 248 nm, maximum charge of 10 nC in 10 ns and charge/cycle of 0.8 nC were measured. The lower QE observed after laser cleaning, compared to the room temperature measurements, is attributed to the long distance between the cathode and the closest ion pump and the possibility of the laser ablated material adsorbed back onto the cathode surface at cryogenic temperature. No cavity quenching has been observed even at the maximum laser energy of 3 mJ, maximum repetition rate of 250 Hz and maximum charge of 10 nC from the cathode.
UR - https://www.scopus.com/pages/publications/33847131515
U2 - 10.1109/PAC.2005.1591180
DO - 10.1109/PAC.2005.1591180
M3 - Conference contribution
AN - SCOPUS:33847131515
SN - 0780388593
SN - 9780780388598
T3 - Proceedings of the IEEE Particle Accelerator Conference
SP - 2556
EP - 2558
BT - Proceedings of the Particle Accelerator Conference, PAC 2005
T2 - Particle Accelerator Conference, PAC 2005
Y2 - 16 May 2005 through 20 May 2005
ER -