Author/Authors :
Komatsubara، نويسنده , , T.K. and Morimoto، نويسنده , , T. and Omata، نويسنده , , K. and Sugimoto، نويسنده , , S. and Tauchi، نويسنده , , K. and Inagaki، نويسنده , , T. and Kabe، نويسنده , , S. and Kobayashi، نويسنده , , M. and Kuno، نويسنده , , Y. and Sato، نويسنده , , T. and Shinkawa، نويسنده , , T. and Yoshimura، نويسنده , , Y. and Chiang، نويسنده , , I.-H. and Kettell، نويسنده , , S. and Li، نويسنده , , K.K. and Littenberg، نويسنده , , L.S. and Yamashita، نويسنده , , A. and Suzuki، نويسنده , , H. and Suzuki، نويسنده , , S.، نويسنده ,
Abstract :
We have developed two types of fine-mesh photomultiplier tubes for an undoped-CsI endcap photon detector installed in a strong axial magnetic field. These photomultiplier tubes have ultraviolet-transmitting glass windows, backed by large-area bialkali photocathodes, in order to efficiently detect scintillation light from undoped-CsI crystals. A gain of more than 2 × 105, in a magnetic field of 1.0 T, was obtained from these tubes with 19-stage fine-mesh dynodes. Gain drops caused by the magnetic field and by high anode currents were investigated. Several performance criteria of the tubes were studied: gain, quantum efficiency, linearity, noise, and transit time spread.
Keywords :
Fine-mesh photomultiplier tube , Undoped-CsI , Endcap , E787 , Magnetic field , gain
