P. H. Hansen
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View article: Experimental Observation of Proton Bunch Modulation in a Plasma at Varying Plasma Densities
Experimental Observation of Proton Bunch Modulation in a Plasma at Varying Plasma Densities Open
We give direct experimental evidence for the observation of the full transverse self-modulation of a long, relativistic proton bunch propagating through a dense plasma. The bunch exits the plasma with a periodic density modulation resultin…
View article: Experimental Observation of Plasma Wakefield Growth Driven by the Seeded Self-Modulation of a Proton Bunch
Experimental Observation of Plasma Wakefield Growth Driven by the Seeded Self-Modulation of a Proton Bunch Open
We measure the effects of transverse wakefields driven by a relativistic proton bunch in plasma with densities of 2.1×10^{14} and 7.7×10^{14} electrons/cm^{3}. We show that these wakefields periodically defocus the proton bunch itself, con…
View article: The electron accelerators for the AWAKE experiment at CERN—Baseline and Future Developments
The electron accelerators for the AWAKE experiment at CERN—Baseline and Future Developments Open
The AWAKE collaboration prepares a proton driven plasma wakefield acceleration experiment using the SPS beam at CERN. A long proton bunch extracted from the SPS interacts with a high power laser and a 10 m long rubidium vapor plasma cell t…
View article: AWAKE readiness for the study of the seeded self-modulation of a 400 GeV proton bunch
AWAKE readiness for the study of the seeded self-modulation of a 400 GeV proton bunch Open
AWAKE is a proton-driven plasma wakefield acceleration experiment. We show that the experimental setup briefly described here is ready for systematic study of the seeded self-modulation of the 400 GeV proton bunch in the 10 m long rubidium…
View article: CERN’s Linac4 cesiated surface H− source
CERN’s Linac4 cesiated surface H− source Open
Linac4 cesiated surface H$^{-}$ sources are routinely operated for the commissioning of the CERN’s Linac4 and on an ion source test stand. Stable current of 40-50 mA are achieved but the transmission through the LEBT of 80% was below expec…