| Paper |
Title |
Page |
TUOBB4 |
Measurement of Ultrasmall Transverse Spot Size |
|
| |
- K.G. Roberts, R.K. Li, P. Musumeci
UCLA, Los Angeles, California, USA
- B.T. Jacobson
RadiaBeam, Santa Monica, USA
|
|
| |
Funding: DARPA
The imaging of extremely small, sub-5 micron, transverse beam spot sizes has been a priority in accelerator physics. Here we propose a scheme to generate and image a beam spot size about 1 micron at PEGASUS laboratory at UCLA. We are preparing a 0.8 mm, 1 pC, 10 MeV electron beam to be sent through a permanent magnet quadrupole (PMQ) triplet of strength 130 T/m, focusing the beam to a waist 1.5 microns and a total focal length of 4.5 mm. We use a YAG screen at the beam waist and a mirror to direct optical (520 nm green) light into a Schwarzschild microscope to collimate the light. We will then image the beam using a CCD camera outside of the beam line.
|
|
|
Slides TUOBB4 [45.484 MB]
|
|
| |
| TUPSM03 |
10s Femtosecond Bunch Length Measurement Based on Coherent Transition Radiation |
631 |
| |
- X.H. Lu, W.-H. Huang, C.-X. Tang
TUB, Beijing, People's Republic of China
- R.K. Li, P. Musumeci, K.G. Roberts, H.L. To
UCLA, Los Angeles, California, USA
|
|
| |
In this paper, we discuss bunch length measurement based on coherent transition radiation for 10s femtosecond electron bunches with of several MeV energy and several pC charge. The ultrashort bunch length is obtained by velocity bunching using a compact dual slot resonantly coupled linac located after an RF photoinjector. Strong focusing with a solenoid is required to enhance the radiation generation. Filters are used to reconstruct coherent transition radiation spectrum. The transverse and longitudinal form factors are also studied with simulation.
|
|
| |