Positron plasma diagnostics and temperature control for antihydrogen production.
Production of antihydrogen atoms by mixing antiprotons with a cold, confined, positron plasma depends critically on parameters such as the plasma density and temperature. We discuss nondestructive measurements, based on a novel, real-time analysis of excited, low-order plasma modes, that provide comprehensive characterization of the positron plasma in the ATHENA antihydrogen apparatus. The plasma length, radius, density, and total particle number are obtained. Measurement and control of plasma temperature variations, and the application to antihydrogen production experiments are discussed.
Amoretti
M
M
Istituto Nazionale di Fisica Nucleare, Sezione di Genova, 16146 Genova, Italy.
Amsler
C
C
Bonomi
G
G
Bouchta
A
A
Bowe
P D
PD
Carraro
C
C
Cesar
C L
CL
Charlton
M
M
Doser
M
M
Filippini
V
V
Fontana
A
A
Fujiwara
M C
MC
Funakoshi
R
R
Genova
P
P
Hangst
J S
JS
Hayano
R S
RS
Jørgensen
L V
LV
Lagomarsino
V
V
Landua
R
R
Lindelöf
D
D
Rizzini
E Lodi
EL
Macrí
M
M
Madsen
N
N
Manuzio
G
G
Montagna
P
P
Pruys
H
H
Regenfus
C
C
Rotondi
A
A
Testera
G
G
Variola
A
A
van der Werf
D P
DP