Betatron Radiation from Underdense Plasma
Lead Research Organisation:
University of Liverpool
Department Name: Physics
Abstract
Plasma accelerators provide unique opportunities for the generation of high quality, short-pulse electrons beams which are an ideal basis for high quality radiation generation.
To commission a new type of very high brightness betatron radiation source, I will first study a single 10 GeV beam generated in a plasma wakefield accelerator, as a 'typical' drive beam. This simple setup will provide "clean", relatively simple physics that can be compared to simulations and models and used to calibrate all devices and detectors.
Following single-bunch commissioning, I will then use two 10 GeV bunches (drive and witness) in a typical plasma wakefield accelerator configuration with accelerating fields of ~10 GeV/m, followed by the wakeless plasma source. Comparing the two, we expect to see a less broad radiation spectrum from the witness bunch in the wakeless plasma, due to the constant beam energy (note: the drive beam loses energy in both cases). The plasma density will then be progressively lowered to observe the transition from high to low (~1) Ku, if possible.
Next, I will repeat the two-bunch procedure above, but using the 100 MeV, low emittance witness beam provided by the planned photo injector near the experimental area of the FACET-II beamline. This configuration would provide a strong low Ku signal at low X-ray energy for the bent crystal detector system.
Finally, I will attempt to generate and observe very high brightness X-ray betatron radiation from an ultra-bright, plasma-injected beam in a wakeless plasma. Progress in this part will depend also on progress in e.g. plasma injection programs, such as Trojan Horse, as well as plasma source development, which must provide a seamless transition from the plasma injection region (wide plasma column, high density) to the wakeless plasma region (narrow plasma column, possibly lower density).
To commission a new type of very high brightness betatron radiation source, I will first study a single 10 GeV beam generated in a plasma wakefield accelerator, as a 'typical' drive beam. This simple setup will provide "clean", relatively simple physics that can be compared to simulations and models and used to calibrate all devices and detectors.
Following single-bunch commissioning, I will then use two 10 GeV bunches (drive and witness) in a typical plasma wakefield accelerator configuration with accelerating fields of ~10 GeV/m, followed by the wakeless plasma source. Comparing the two, we expect to see a less broad radiation spectrum from the witness bunch in the wakeless plasma, due to the constant beam energy (note: the drive beam loses energy in both cases). The plasma density will then be progressively lowered to observe the transition from high to low (~1) Ku, if possible.
Next, I will repeat the two-bunch procedure above, but using the 100 MeV, low emittance witness beam provided by the planned photo injector near the experimental area of the FACET-II beamline. This configuration would provide a strong low Ku signal at low X-ray energy for the bent crystal detector system.
Finally, I will attempt to generate and observe very high brightness X-ray betatron radiation from an ultra-bright, plasma-injected beam in a wakeless plasma. Progress in this part will depend also on progress in e.g. plasma injection programs, such as Trojan Horse, as well as plasma source development, which must provide a seamless transition from the plasma injection region (wide plasma column, high density) to the wakeless plasma region (narrow plasma column, possibly lower density).
People |
ORCID iD |
Carsten Welsch (Primary Supervisor) | |
Monika Yadav (Student) |
Studentship Projects
Project Reference | Relationship | Related To | Start | End | Student Name |
---|---|---|---|---|---|
ST/P006752/1 | 30/09/2017 | 29/09/2024 | |||
2113613 | Studentship | ST/P006752/1 | 30/09/2018 | 30/03/2023 | Monika Yadav |