スダレ型2次電子増倍管に関する基礎研究

抄録

Studies on the Venetian blind type electron multiplier (VBEM) were carried out by the investigations of the potential distribution and the electron trajectory and further by the experiment for the three multipliers having different dynode piece, intervals. As the dynode piece, Cu-Be (2%) sheet was used.
By using appropriately wide piece interval, good multiplication efficiency was obtained at relatively small applied voltage.
On the basis of these preliminary studies, 12-stage and 16-stage multipliers were constructed. The gain of the former multiplier was about 1.3 × 10⁵ at 3 KV applied voltage and that of the latter about 2 × 10⁶ at 4 KV. The 12-stage VBEM was used in an R. F. mass spectrometer and retarding field energy analyzer, and the results showed that the VBEM had a good performance characteristics.