TY - GEN
T1 - Progress in reducing the back-bombardment effect in the itc-RF gun for t-acts project at Tohoku university
AU - Li, X.
AU - Kashiwagi, S.
AU - Kawai, M.
AU - Hinode, F.
AU - Nanbu, K.
AU - Muto, T.
AU - Miyahara, F.
AU - Tanaka, Y.
AU - Hama, H.
PY - 2012
Y1 - 2012
N2 - An ITC (independently tunable cells) thermionic RF gun has been developed as the electron source for coherent terahertz radiations at Tohoku University. Both experiments and simulations have shown that the back-bombardment (B.B.) effect on the LaB6 cathode is a serious issue for stable operation. A numerical model has been developed to evaluate the increase of the cathode temperature due to B.B. in which the 2D equation for heat conduction is solved by taking the back-streaming electrons into account. Using this model we have studied the possibility of suppressing the B.B. by imposing external dipole field and by optimization of the cathode size, compared with experimental data. The results will be reported here.
AB - An ITC (independently tunable cells) thermionic RF gun has been developed as the electron source for coherent terahertz radiations at Tohoku University. Both experiments and simulations have shown that the back-bombardment (B.B.) effect on the LaB6 cathode is a serious issue for stable operation. A numerical model has been developed to evaluate the increase of the cathode temperature due to B.B. in which the 2D equation for heat conduction is solved by taking the back-streaming electrons into account. Using this model we have studied the possibility of suppressing the B.B. by imposing external dipole field and by optimization of the cathode size, compared with experimental data. The results will be reported here.
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M3 - Conference contribution
AN - SCOPUS:84885618241
SN - 9783954501151
T3 - IPAC 2012 - International Particle Accelerator Conference 2012
SP - 643
EP - 645
BT - IPAC 2012 - International Particle Accelerator Conference 2012
T2 - 3rd International Particle Accelerator Conference 2012, IPAC 2012
Y2 - 20 May 2012 through 25 May 2012
ER -