Author/Authors :
Sumiyoshi، نويسنده , , Takayuki and Tokanai، نويسنده , , Fuyuki and Sugiyama، نويسنده , , Hiroyuki and Okada، نويسنده , , Teruyuki and Ohishi، نويسنده , , Noboru and Ohmura، نويسنده , , Takayuki and Sakurai، نويسنده , , Hirohisa and Gunji، نويسنده , , Shuichi، نويسنده ,
Abstract :
Gaseous photomultiplier tubes with micro-pattern gas detectors sensitive to visible light are under development. Long term stability of a bi-alkali photocathode is examined for more than 500 days. A micro-pattern gas detector of Kapton GEM is found to be incompatible with bi-alkali photocathode, while a glass capillary plate has no problem. A new production method for a Pyrex glass GEM has been developed. Some studies on ion-feedback suppression are presented.
