The Advanced Wakefield Experiment, or AWAKE, is an experiment based at
CERN (European Organization for Nuclear Research) whose purpose is to demon-
strate the acceleration of electrons using plasma wakefields driven by a charged par-
ticle bunch. As a proof-of-principle experiment, AWAKE will be propagating a high-
energy proton bunch through 10 meters of plasma to drive the wakefields for electron
acceleration. To accelerate the electrons, we want to inject them into regions of both
focusing and acceleration within these wakefields behind the proton bunch. In order
for the electrons to stay within this optimal accelerating/focusing region, we need
to maintain uniform plasma density within 0.2%, and we need to inject when the
wakefield phase-velocity is constant. To preserve uniform plasma density, we use a
liquid heat-exchanging pipe which can maintain stable temperatures, and therefore
uniform rubidium vapor/plasma densities, to within 0.2%. We show that this is pos-
sible using Galden HT270 as a heat-exchanging liquid. We also show that additional
components required for this system will need external heating to prevent heat-loss,
and therefore temperature non-uniformity. Furthermore, using the PIC simulation
OSIRIS, we study how changing size parameters of the initial proton bunch by ±5%
a ects the phase-velocity of the wakefield. It is seen that these parameter variations
will not significantly affect the optimal region size and energy gain of injected elec-
trons; so long as the electrons are injected at regions of ξ near σzb of the proton bunch
and after 4 m of bunch propagation length in the plasma. / Graduate
| Identifer | oai:union.ndltd.org:uvic.ca/oai:dspace.library.uvic.ca:1828/7546 |
| Date | 14 September 2016 |
| Creators | Savard, Nicolas |
| Contributors | Merminga, Lia, Karlen, Dean Albert |
| Source Sets | University of Victoria |
| Language | English, English |
| Detected Language | English |
| Type | Thesis |
| Rights | Available to the World Wide Web |
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