intense u*beam epithermal u 4 MeV energy 100%polarization source of LE-u*beam 100%polarization > Al,structured Si or Ag layer of condensed gas T=10K,d=320,380or125um (Ne,Ar,N2) d=300-500nm
Moderator efficient The most efficient moderators to date are s-Ne,s-Ar, and s-N2.Using a flat Al substrate and choosing a momentum bite Ap/p 4%(FWHM)of the incoming surface muon beam,we measured the following moderation EMo=NeV /NMev Ne eMod =6.6(7)×105 o=4.0(4)×105 Ar =3.2(3)×10-5
Moderator efficient • The most efficient moderators to date are s-Ne, s-Ar, and s-N2. Using a flat Al substrate and choosing a momentum bite Dp/p = 4%(FWHM) of the incoming surface muon beam, we measured the following moderation
Ar 255075 100 Energy spectrum of the emitted muons after moderation of surface muons in a solid argon layer.The useful energy interval of epithermal muons is shown
• Energy spectrum of the emitted muons after moderation of surface muons in a solid argon layer. The useful energy interval of epithermal muons is shown
TABLE I.Results of the polarization measurements. Moderator Asymmetry(%) Polarization P(%) Polarization P'(%)d Ar 18.24±0.56 87.0±2.8 91.7±7.5 Krs 16.81±4.30 80±20 85±23 Alb 19.89±1.50 94.8±7.2 100 a Very slow muons (E~10 ev). b Muons with keV energy. c Normalized to asymmetry of surface muons in MCP. d Normalized to asymmetry of keV muons emitted from the Al moderator