Gas electron multiplier: performance and possibilities
  The gas electron multiplier produced with the polyimide film 100 um thick. The maximum gas gain obtained with gas mixture Ar/CH4(91/9) was 5000. No decrease of gas gain with rates up to 2\cdot10^4 1/(mm^2 s) was observed. The possibility of operation of GEM with and without MSGC is discussed 
M.A. Negodaev (1), B.N. Lomonosov (1), S.K. Kotelnikov (1), A.V.   Bagulya (1), E.M. Negodaeva (1), A.N. Laritchev (2), V.Yu...