HRRL 03-18-2011

Tune parameters

Previous Tune at the higher energy

Solenoid 1	5.4 A
Solenoid 2	5.5 A
Gun Ver	-0.2 A
Gun Hor	+0.4 A
Output Hor	-0.5 A
Output Ver	-0.5 A
Gun HV	+9.75 (Knob Setting)
Gun Grid Voltage	5.25 (Knob Setting)
RF frequency	2855.813 MHz
Modulator HV Power Supply	4.11 (Knob Setting)
RF macro Pulse Length (FWHM)	200 ns

Solenoid comparison with yesterdays higher energy tune

V1 (Gun Vertical)	H1 (Gun Horizontal)	Sol1 (Gun Sol)	V2 (Output Vertical)	H2 (Output horizontal	Sol 2 (Output solenoid)	OTR Pict	FC pict
(A)	(A)	(A)	(A)	(A)	(A)
(-0.3)	+0	0	0	-0	-0
(-0.2)	+0.4	5.4	-0.5	-0.5	5.5
(-0.2)	+0.4	6.8	-0.5	-0.5	5.5
(-0.2)	+0.4	6.8	-0.5	-0.5	10.4

Quad Scans

To test reproducibility from yesterday. Scan at 40, 20, 10, 5 mA peak currents. Scan twice on each Current.

Do Energy Scan

Bend the beam through 45 bending dipole, take images on the scope of FC and YAG images.

D1 current	Energy	FC peak Volt	Pic
(A)	MeV	mV
28	11.85	39
29	12.3	74
30	12.74	93
30.5	12.96	65
30.7	large uncertainty	22

Quad 1 Scan

Quad 1	OTR Pict	FC pict
(A)
+0
+0.2
+0.4
+0.6
+0.8
+1.0
+1.2
+1.4
+1.6
+1.8
+2.0

Calibration

Estimate the error in the above calibration

Data Analysis

Preliminary results

Here is the study on how to fit non_Gaussian curve. I fitted for whole image as well as parts of the image.

Here is beam profile, which is non-Gaussian.

Fits for whole image:

Fits for x=[362,404] and y=[241,301]:

Gaussian fitted for whole image

12.74 MeV

Fitted Gaussian for whole image x-projection:

emit=0.521 +- 0.013 mm*mrad, emit_norm=13.002 +- 0.330 mm*mrad

beta=0.884 +- 0.025, alpha=0.469 +-0.027

Gaussian fitted for part 1 of the image

Fitted Gaussian for part 1 of the image

       xl = 362;% center at 382
       xr = 404;
       yl = 241;% center at 271
       yr = 301;

xl: x left, xr: x right. yl: y left, yr: y right.

x-projection:

emit=0.322 +- 0.001 mm*mrad, emit_norm=8.022 +- 0.033 mm*mrad

beta=3.110 +- 0.003, alpha=0.906 +-0.002

Gaussian fitted for part 2 of the image

Fitted Gaussian for part 2 of the image

       xl = 342;% center at 382
       xr = 424;
       yl = 241;% center at 271
       yr = 301;

x-projection:

emit=0.360 +- 0.001 mm*mrad, emit_norm=8.970 +- 0.031 mm*mrad

beta=1.993 +- 0.001, alpha=0.672 +-0.001

Gaussian fitted for part 3 of the image

Fitted Gaussian for part 3 of the image

       xl = 342;% center at 382
       xr = 424;
       yl = 221;% center at 271
       yr = 321;
       

x-projection:

emit=0.360 +- 0.001 mm*mrad, emit_norm=8.970 +- 0.031 mm*mrad

beta=1.993 +- 0.001, alpha=0.672 +-0.001

Gaussian fitted for part 4 of the image

Fitted Gaussian for part 4 of the image

       xl = 322;% center at 382
       xr = 444;
       yl = 221;% center at 271
       yr = 321;

x-projection:

emit=0.350 +- 0.001 mm*mrad, emit_norm=8.738 +- 0.032 mm*mrad

beta=1.344 +- 0.002, alpha=0.464 +-0.002

Analysis with root

Q1_Scan, 42mA peak current, Scan Coil Current at positive 1.8_Amp

Image

Back grounds

Previous Tune at the higher energy

Signal	Background
These MATLAB fits are set to fit at 0.7 times above height of the peak.
Matlab fit to x profile sigma_x = 24.97 px	Matlab fit to x profile sigma_x = 44.45 px

HRRL_Emittance_Measurements_March14-18-2011