10 May 2004

1.8 GeV: PS muons removed from muon sample and hard cut at 40 removes electrons...

Same at 2 GeV

CovADC1 vs CovADC3 at 2GeV

Same as above with no hits in >=58 cut ( to remove PS muons )

Note the 155 entries remaining...

Cerenkov lengths: Upstream:4.4m Middle:2.5m Downstream:3.5m

I've done it a bit backwards, but of the 155 entries after the multiplicity cut, none of them are consistent with being electrons... Cov Cut + Multiplicity cuts remove all electrons...

No hard cut... Use multiplicity cut instead: 1.9 < No. hits in event / Planes hit < 2.45, contamination in Cov3 must be pions...

Particles that don't pass the multiplicity cut.
Cov 1 vs Cov 3, colour shows particle range.

As above, peak height shows particle range.