Measurement of Field Emission Dark Current from the Titanium, Copper, and Stainless Steel Electrodes under the High DC-Field Gradient Condition		433
	F. Furuta, C. Suzuki, T. Nakanishi, S. Okumi, T. Goto, K. Wada, M. Yamamoto, T. Nishitani, M. Miyamoto, M. Kuwahara, T. Hirose, R. Mizuno, N. Yamamoto (Nagoya Univ.), H. Matsumoto, M. Yoshioka (KEK)