Startup Procedure

Work in progress - please take a coffee and ask Marije

wnd = software window

Step	Where can I find that?	Action	Details
1	Main panel	Switch on all 5 FELIX & Felice buttons	Set the beam energy in MeV. In the window “uc_flx_gui”, go to “calc”, “enter” and “move”. Set “Mean Gap” to 35 mm (this makes the lasing easier to find at first). Common ranges are:
2	FELIX User Station (wnd )	Select the correct user station	Set the beam energy in MeV. In the window “uc_flx_gui”, go to “calc”, “enter” and “move”. Set “Mean Gap” to 35 mm (this makes the lasing easier to find at first). Common ranges are:
		Select 25 MHz or 1 GHz
3	FELIX_dump_line_L2 (wnd)	Find or Load a previous dump-line setting for E-range	Set the beam energy in MeV. In the window “uc_flx_gui”, go to “calc”, “enter” and “move”. Set “Mean Gap” to 35 mm (this makes the lasing easier to find at first). Common ranges are:
4		Find or Load the same setting in low-lever RF phases
5	Magneetslingercircuit (wnd)	Change current to match 2B20-25
6	Gun > Felix (wnd)	Change gun bias to ~170.5 V @ 25 MHz or ~80 V @ 1 GHz.	Precise number can be found in the file name
7	HPRF.vi (wnd)	Check the file has correctly loaded in the HPRF window. Set values to match the yellow values
8	Main panel	Switch the “3GHz RF timing on” button on
9	low level RF phases (wnd)	Set klystron modulators to target values (from file name). Step is 4kV - 5kV. Press ‘feedback’ off, and ‘zero’.
10	on Flare interface computer	If FLARE solenoids are off, switch them on.
11	LLRF power (wnd)	press ‘feedback’ off, and ‘zero’ all.
12	Felix Timers (wnd)	Check timer S1 = 2µs and rep. rate = 1Hz. Open vacuum system.
13	OC Control (wnd)	Insert BS, and align cavity mirrors. Watch 2S21, align downstream. Watch 2S41, align upstream. Remove BS.
14	Main panel	Press ‘GUN RF timing on’.
15	Felix dump line L2 (wnd)	Optimize e- path. Align with indicator. PM10 = SX10. PM20 = SX11. PM30 = SX30* (fault with blue, align 1 square below indicator). PM40 = SX40. PM50 = SX55. PM60 = SX70. Slowly ramp to 10µs / 10Hz, ensure all e- are dumped.
16	low level RF phases (wnd )	Fine-tune low level RF phases. Once done, press ‘zero’, ‘load’, and ‘feedback on’ in all.
17	At diagnostic station	switch amplifier to x1 (@1GHz) or x10 (@25MHz).
18	Gun / prebuncher Felix (wnd)	Adjust gun bias to achieve 360mV @25MHz / 200mV @1GHz (yellow curve on scope)
19	OC control Felix (wnd )	Find cavity zero. Set ‘dt_CLdetuning’ to zero, and adjust “DT_CLzero” close to an unstable state. Then, reset ‘dt_CLdetuning’ to 1.8.
20	uc-flx-gui (wnd)	Calibrate λ. Go to calc, and set lambda to correct live value.

Free-Electron Laser for Infrared eXperiments

Free-electron Laser for Advanced spectroscopy and high-Resolution Experiments