Improved lifetime of microchannel-plate PMTs
- Lehmann, A.
- Britting, A.
- Eyrich, W.
- Uhlig, F.
- Dzhygadlo, R.
- Gerhardt, A.
- Götzen, K.
- Höhler, R.
- Kalicy, G.
- Kumawat, H.
- Lehmann, D.
- Lewandowski, B.
- Patsyuk, M.
- Peters, K.
- Schepers, G.
- Schmitt, L.
- Schwarz, C.
- Schwiening, J.
- Traxler, M.
- Zühlsdorf, M.
- Dodokhov, V.Kh.
- Düren, M.
- Föhl, K.
- Hayrapetyan, A.
- Kröck, B.
- Merle, O.
- Rieke, J.
- Cowie, E.
- Keri, T.
- Montgomery, R.
- Rosner, G.
- Achenbach, P.
- Cardinali, M.
- Hoek, M.
- Lauth, W.
- Sfienti, C.
- Thiel, M.
- Bühler, P.
- Gruber, L.
- Marton, J.
- Suzuki, K.
DOIAbstract
The charged particle identification at the PANDA experiment will be mainly performed with DIRC detectors. Because of their advantageous properties the preferred photon sensors are MCP-PMTs. However, until recently these devices showed serious aging problems which resulted in a diminishing quantum efficiency (QE) of the photo cathode. By applying innovative countermeasures against the aging causes, the manufacturers recently succeeded in drastically improving the lifetime of MCP-PMTs. Especially the application of an ALD coating technique to seal the material of the micro-channels proves very powerful and results in a lifetime of integrated anode charge without a substantial QE degradation for the latest PHOTONIS XP85112. This paper will pr...
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