FEL2019 - List of Keywords (solenoid)

Paper	Title	Other Keywords	Page
WEP057	Performance Optimization of Low-Emittance DC-SRF Injector Using Cs2Te Photocathode	emittance, cavity, electron, SRF	463
	S. Zhao Peking University, Beijing, People’s Republic of China S. Huang, K.X. Liu, Y.Q. Liu, D.M. Ouyang PKU, Beijing, People’s Republic of China
	A low-emittance DC-SRF injector (DC-SRF-II) is under construction at Peking University, in the earlier design of which K2CsSb photocathode was chosen. Recently we changed the cathode to Cs2Te, which is more widely used nowadays, and carried out a detailed performance optimization. In this paper, we present our latest simulation results, which show that an emittance under 0.5 mm-mrad can be achieved at the bunch charge of 100 pC.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-WEP057
About •	paper received ※ 14 August 2019 paper accepted ※ 27 August 2019 issue date ※ 05 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THP027	Simulation and Optimization of the Transport Beamline for the NovoFEL RF Gun	gun, simulation, electron, emittance	647
	A.S. Matveev, I.V. Davidyuk, O.A. Shevchenko, V.G. Tcheskidov, N.A. Vinokurov, V. Volkov BINP SB RAS, Novosibirsk, Russia I.V. Davidyuk, A.S. Matveev, N.A. Vinokurov NSU, Novosibirsk, Russia
	A new low-frequency CW RF gun was developed and tested at Budker Institute of Nuclear Physics recently. We plan to use it to upgrade the ERL of the Novosibirsk FEL facility. It will allow increasing the average beam current (due to higher beam repetition rate) and thus increasing the average radiation power. The transport beamline for the RF gun uses the ninety-degree achromatic bend. It is designed in a way that keeps an option to operate with the old electrostatic gun as well. Due to the low beam energy (290 keV) the beam dynamics is strongly influenced by space-charge forces. The paper describes results of simulation and optimization of the RF gun transport beamline. Space-charge forces were taken into account with the code ASTRA. Main sources of emittance degradation were considered in order to decrease their influence during the optimization. In addition, the RF gun output beam parameters were measured for various RF gun emission phases. These experiments were simulated and the results were compared. The resulting beam parameters meets requirements of the Novosibirsk FEL facility ERL.
	Poster THP027 [3.158 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-THP027
About •	paper received ※ 16 August 2019 paper accepted ※ 27 August 2019 issue date ※ 05 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

WEP057

Performance Optimization of Low-Emittance DC-SRF Injector Using Cs2Te Photocathode

emittance, cavity, electron, SRF

463

S. Zhao
Peking University, Beijing, People’s Republic of China
S. Huang, K.X. Liu, Y.Q. Liu, D.M. Ouyang
PKU, Beijing, People’s Republic of China

A low-emittance DC-SRF injector (DC-SRF-II) is under construction at Peking University, in the earlier design of which K2CsSb photocathode was chosen. Recently we changed the cathode to Cs2Te, which is more widely used nowadays, and carried out a detailed performance optimization. In this paper, we present our latest simulation results, which show that an emittance under 0.5 mm-mrad can be achieved at the bunch charge of 100 pC.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-WEP057

About •

paper received ※ 14 August 2019 paper accepted ※ 27 August 2019 issue date ※ 05 November 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THP027

Simulation and Optimization of the Transport Beamline for the NovoFEL RF Gun

gun, simulation, electron, emittance

647

A.S. Matveev, I.V. Davidyuk, O.A. Shevchenko, V.G. Tcheskidov, N.A. Vinokurov, V. Volkov
BINP SB RAS, Novosibirsk, Russia
I.V. Davidyuk, A.S. Matveev, N.A. Vinokurov
NSU, Novosibirsk, Russia

A new low-frequency CW RF gun was developed and tested at Budker Institute of Nuclear Physics recently. We plan to use it to upgrade the ERL of the Novosibirsk FEL facility. It will allow increasing the average beam current (due to higher beam repetition rate) and thus increasing the average radiation power. The transport beamline for the RF gun uses the ninety-degree achromatic bend. It is designed in a way that keeps an option to operate with the old electrostatic gun as well. Due to the low beam energy (290 keV) the beam dynamics is strongly influenced by space-charge forces. The paper describes results of simulation and optimization of the RF gun transport beamline. Space-charge forces were taken into account with the code ASTRA. Main sources of emittance degradation were considered in order to decrease their influence during the optimization. In addition, the RF gun output beam parameters were measured for various RF gun emission phases. These experiments were simulated and the results were compared. The resulting beam parameters meets requirements of the Novosibirsk FEL facility ERL.

Poster THP027 [3.158 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-THP027

About •

paper received ※ 16 August 2019 paper accepted ※ 27 August 2019 issue date ※ 05 November 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)