Ultracold Muonium Negative Ion Production

4 Sep 2018, 15:30
2h 30m
Board: 38
Poster Other Negative ion sources Poster Session #2

Speaker

Prof. Vadim Dudnikov (Muons, Inc)

Description

A new, efficient method to produce ultracold negative muon ions is proposed. The muonium atom is made up of an anti muon and an electron and is given the chemical symbol Mu. A second electron with binding energy or electron affinity of 0.75 eV makes the Mu- ion, which is in many ways almost identical to the H- ion that is used for charge-exchange injection into most proton particle accelerators. Muonium negative ions were observed in 1987 [ , ] by interaction of muons with a foil. Using the foil charge-exchange approach, the efficiency of transformation of muons to negative muonium ions has been very low ~10-4. However, by using a hot tungsten or palladium single crystal foil treated by cesium deposition, the production efficiency can be improved up to 50%. The process described here has surface muons focused onto a tungsten or palladium single crystal foil (that can be heated up to 2000 Celsius) and partially covered by a cesium layer up to minimal work function. The negative muon ions can be extracted by a DC electric field and further accelerated by a linac and stripped in a thin foil.

Primary author

Prof. Vadim Dudnikov (Muons, Inc)

Co-authors

Mr Andrei Dudnikov (BINP) Dr Rolland Johnson (Muons, Inc)

Presentation Materials

There are no materials yet.