PAC2013 - List of Authors (To, H.L.)

Paper	Title	Page
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.

THPAC37	Surface Plasmon Resonance Enhanced Multiphoton Emission from Metallic Cathode	1220
	H.L. To, G. Andonian, R.K. Li, P. Musumeci UCLA, Los Angeles, USA G. Andonian RadiaBeam, Marina del Rey, USA
	We investigate the effect of surface plasmonic optical field enhancement on multiphoton emission from a metallic photocathode. In a previous experiment , two orders of magnitude increase in charge yield was obtained using a slightly off resonance nanohole array plasmonic structure. In a new attempt, a nanohole structure will be fabricated, using focused ion beam milling, such that the resonance wavelength is at 800 nm, the central wavelength of the photoinjector driver laser pulse. The charge yield is expected to increase dramatically compared to the charge yield from previous nanostructure. We will also present optical characterization of the nanostructures as well the beam characteristics (intrinsic emittance and bunch length) from this nanostructured photocathode. Li et al., PRL 2013.

Paper

Title

Page

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.

THPAC37

Surface Plasmon Resonance Enhanced Multiphoton Emission from Metallic Cathode

1220

H.L. To, G. Andonian, R.K. Li, P. Musumeci
UCLA, Los Angeles, USA
G. Andonian
RadiaBeam, Marina del Rey, USA

We investigate the effect of surface plasmonic optical field enhancement on multiphoton emission from a metallic photocathode. In a previous experiment *, two orders of magnitude increase in charge yield was obtained using a slightly off resonance nanohole array plasmonic structure. In a new attempt, a nanohole structure will be fabricated, using focused ion beam milling, such that the resonance wavelength is at 800 nm, the central wavelength of the photoinjector driver laser pulse. The charge yield is expected to increase dramatically compared to the charge yield from previous nanostructure. We will also present optical characterization of the nanostructures as well the beam characteristics (intrinsic emittance and bunch length) from this nanostructured photocathode.
* Li et al., PRL 2013.