CNT as a positron trap
Expected electron (or positron) number in CNT: 1012
- We expect to operate well below the Brillouin density limit, nB=?0B2/(2me) = 4.8?1016 m-3 at B=0.1 T
- At n=1014 m-3<< nB there will be ~1012 electrons in the trap
Maximum electron (or e+) energy confined in CNT: ~1 keV
- Magnetic fields are very efficient at confining light charged particles - the Larmor orbits are tiny (less than 1 mm at 1 keV energy).
Scale up: B=1 T, a=10 cm quasi-helical stellarator
- Would confine positrons in the 0.5 MeV range, thus trapping essentially all positrons from radioactive sources or high energy colliders. If we can get them in�
- Cyclotron radiation cooling 100 times more efficient than at 0.1 T