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Ahlén, O. (2013) Rydberg Hydrogen Detector with n-state dependent Field Ionization. Göteborg : Chalmers University of Technology
BibTeX
@mastersthesis{
Ahlén2013,
author={Ahlén, Olof},
title={Rydberg Hydrogen Detector with n-state dependent Field Ionization},
abstract={The design of a detector for Rydberg Hydrogen atoms, capable of probing the distribution of n-states is investigated. The device is needed for the construction and
commissioning of the AEgIS-apparatus at CERN, aiming to measure the gravitational interaction between matter and antimatter. The detector works by field ionizing the H
atoms and consequently detecting the liberated electrons. Information about the n-state distribution can be extracted based on that different states field ionize at different field
strengths. An analytical derivation of the electric field in the detector is obtained by solution of Laplace's equation. The process of field ionization is also discussed. Together, this allows for the calculation of the ionization properties of the detector and hence the detection
efficiencies for different n-states given a design choice of the detector. In the most extreme configuration, virtually all states with n 16 can be ionized somewhere in the detector but the tightly bound states only ionize in a small region
where the electric field is the largest. The detection efficiency (which depends on the area in which a state ionizes) for different n states goes approximately linearly from 100%
for n 27 to 0% for n 13. Ionization happens in a magnetic field of 1T which should guide the ionization products downstream for detection. Particle tracking simulations
show that this works well for electrons, which exhibit a very small cyclotron motion while protons exhibit a comparatively large cyclotron motion that in effect renders them inappropriate for detection.},
publisher={Institutionen för fundamental fysik, Subatomär fysik, Chalmers tekniska högskola},
place={Göteborg},
year={2013},
note={66},
}
RefWorks
RT Generic
SR Electronic
ID 182534
A1 Ahlén, Olof
T1 Rydberg Hydrogen Detector with n-state dependent Field Ionization
YR 2013
AB The design of a detector for Rydberg Hydrogen atoms, capable of probing the distribution of n-states is investigated. The device is needed for the construction and
commissioning of the AEgIS-apparatus at CERN, aiming to measure the gravitational interaction between matter and antimatter. The detector works by field ionizing the H
atoms and consequently detecting the liberated electrons. Information about the n-state distribution can be extracted based on that different states field ionize at different field
strengths. An analytical derivation of the electric field in the detector is obtained by solution of Laplace's equation. The process of field ionization is also discussed. Together, this allows for the calculation of the ionization properties of the detector and hence the detection
efficiencies for different n-states given a design choice of the detector. In the most extreme configuration, virtually all states with n 16 can be ionized somewhere in the detector but the tightly bound states only ionize in a small region
where the electric field is the largest. The detection efficiency (which depends on the area in which a state ionizes) for different n states goes approximately linearly from 100%
for n 27 to 0% for n 13. Ionization happens in a magnetic field of 1T which should guide the ionization products downstream for detection. Particle tracking simulations
show that this works well for electrons, which exhibit a very small cyclotron motion while protons exhibit a comparatively large cyclotron motion that in effect renders them inappropriate for detection.
PB Institutionen för fundamental fysik, Subatomär fysik, Chalmers tekniska högskola,
LA eng
LK http://publications.lib.chalmers.se/records/fulltext/182534/182534.pdf
OL 30
