Post on 19-Oct-2020
Setup Beam Studies Summary
Bunch-by-bunch Feedback at the MLSUpdates and Beam Studies
F. Falkenstern1, J. Feikes1, M. Ries1, A. Shaelicke1, D.Teytelman2, et. al.
1HZB, Berlin, Germany2Dimtel, Inc., San Jose, CA, USA
February 13, 2014
Setup Beam Studies Summary
Outline
1 SetupSystem Updates
2 Beam StudiesBeam Transfer FunctionBunch CleaningLongitudinal Feedback on The RampLongitudinal Grow/Damp MeasurementsPost-mortem Data
Setup Beam Studies Summary
Work Summary
Updated all 4 iGp12 units to a new gateware/softwarerelease:
Feedback filter lengthened from 16 to 24 taps;BRAM acquisition memory increased from 192k to 324k;Single-bunch acquisition engine added, BTF functionality;Trigger capture, polarity;Front-end phase tracking;Time-domain modulation of drive signal.
Performed timing offset calibrations, should simplify futureupdates;Found front/back-end DAC unresponsive (controls phaseshifters, fan speed). Need to replace GPIO cable, willprovide a standard short cable.
Setup Beam Studies Summary
What Was Done When
Day by DayJanuary 8 Calibration of Y and SPARE units, a bit of tuning in
the longitudinal plane, some testing with beam,BESSY II work.
January 9 Updated and calibrated Z unit, timed and phasedlongitudinal and horizontal, optimizedbunch-to-bunch isolation, demonstrated bunchcleaning, single bunch transfer function.
January 10 Timed and phased vertical plane, set uppost-mortem diagnostics, Z feedback on the ramp,growth rate studies, 10 ps optics.
Setup Beam Studies Summary
Outline
1 SetupSystem Updates
2 Beam StudiesBeam Transfer FunctionBunch CleaningLongitudinal Feedback on The RampLongitudinal Grow/Damp MeasurementsPost-mortem Data
Setup Beam Studies Summary
Longitudinal Beam Transfer Function
85 90 95 100 105 110 115 120 125 130−70
−60
−50
−40
−30
−20
−10
Frequency (kHz)
Mag
nitu
de (
dB)
Peak −16.2 dB at 105.4 kHz
85 90 95 100 105 110 115 120 125 130−50
0
50
100
150
200
250
Frequency (kHz)
Pha
se (
deg)
Center phase 90.0 deg @ 105.3 kHz
Open-loop BTF;Shift gain of 0;Shift gain of 1;Shift gain of 2;Shift gain of 3;Shift gain of 4;Shift gain of 5;Shift gain of 6;BTF peak vs. feedbackgain.
Setup Beam Studies Summary
Longitudinal Beam Transfer Function
85 90 95 100 105 110 115 120 125 130−70
−60
−50
−40
−30
−20
−10
Frequency (kHz)
Mag
nitu
de (
dB)
Peak −25.1 dB at 105.2 kHz
85 90 95 100 105 110 115 120 125 130−50
0
50
100
150
200
250
Frequency (kHz)
Pha
se (
deg)
Center phase 89.7 deg @ 105.3 kHz
Open-loop BTF;Shift gain of 0;Shift gain of 1;Shift gain of 2;Shift gain of 3;Shift gain of 4;Shift gain of 5;Shift gain of 6;BTF peak vs. feedbackgain.
Setup Beam Studies Summary
Longitudinal Beam Transfer Function
85 90 95 100 105 110 115 120 125 130−70
−60
−50
−40
−30
−20
−10
Frequency (kHz)
Mag
nitu
de (
dB)
Peak −29.7 dB at 105.2 kHz
85 90 95 100 105 110 115 120 125 130−50
0
50
100
150
200
250
Frequency (kHz)
Pha
se (
deg)
Center phase 92.0 deg @ 105.3 kHz
Open-loop BTF;Shift gain of 0;Shift gain of 1;Shift gain of 2;Shift gain of 3;Shift gain of 4;Shift gain of 5;Shift gain of 6;BTF peak vs. feedbackgain.
Setup Beam Studies Summary
Longitudinal Beam Transfer Function
85 90 95 100 105 110 115 120 125 130−70
−60
−50
−40
−30
−20
−10
Frequency (kHz)
Mag
nitu
de (
dB)
Peak −34.8 dB at 105.6 kHz
85 90 95 100 105 110 115 120 125 130−50
0
50
100
150
200
250
Frequency (kHz)
Pha
se (
deg)
Center phase 89.7 deg @ 105.3 kHz
Open-loop BTF;Shift gain of 0;Shift gain of 1;Shift gain of 2;Shift gain of 3;Shift gain of 4;Shift gain of 5;Shift gain of 6;BTF peak vs. feedbackgain.
Setup Beam Studies Summary
Longitudinal Beam Transfer Function
85 90 95 100 105 110 115 120 125 130−70
−60
−50
−40
−30
−20
−10
Frequency (kHz)
Mag
nitu
de (
dB)
Peak −40.6 dB at 104.8 kHz
85 90 95 100 105 110 115 120 125 130−50
0
50
100
150
200
250
Frequency (kHz)
Pha
se (
deg)
Center phase 88.4 deg @ 105.5 kHz
Open-loop BTF;Shift gain of 0;Shift gain of 1;Shift gain of 2;Shift gain of 3;Shift gain of 4;Shift gain of 5;Shift gain of 6;BTF peak vs. feedbackgain.
Setup Beam Studies Summary
Longitudinal Beam Transfer Function
85 90 95 100 105 110 115 120 125 130−70
−60
−50
−40
−30
−20
−10
Frequency (kHz)
Mag
nitu
de (
dB)
Peak −46.4 dB at 106.7 kHz
85 90 95 100 105 110 115 120 125 130−50
0
50
100
150
200
250
Frequency (kHz)
Pha
se (
deg)
Center phase 89.1 deg @ 105.4 kHz
Open-loop BTF;Shift gain of 0;Shift gain of 1;Shift gain of 2;Shift gain of 3;Shift gain of 4;Shift gain of 5;Shift gain of 6;BTF peak vs. feedbackgain.
Setup Beam Studies Summary
Longitudinal Beam Transfer Function
85 90 95 100 105 110 115 120 125 130−70
−60
−50
−40
−30
−20
−10
Frequency (kHz)
Mag
nitu
de (
dB)
Peak −51.1 dB at 107.1 kHz
85 90 95 100 105 110 115 120 125 130−50
0
50
100
150
200
250
Frequency (kHz)
Pha
se (
deg)
Center phase 86.0 deg @ 105.7 kHz
Open-loop BTF;Shift gain of 0;Shift gain of 1;Shift gain of 2;Shift gain of 3;Shift gain of 4;Shift gain of 5;Shift gain of 6;BTF peak vs. feedbackgain.
Setup Beam Studies Summary
Longitudinal Beam Transfer Function
85 90 95 100 105 110 115 120 125 130−70
−60
−50
−40
−30
−20
−10
Frequency (kHz)
Mag
nitu
de (
dB)
Peak −54.5 dB at 86.9 kHz
85 90 95 100 105 110 115 120 125 130−50
0
50
100
150
200
250
Frequency (kHz)
Pha
se (
deg)
Center phase 86.0 deg @ 105.6 kHz
Open-loop BTF;Shift gain of 0;Shift gain of 1;Shift gain of 2;Shift gain of 3;Shift gain of 4;Shift gain of 5;Shift gain of 6;BTF peak vs. feedbackgain.
Setup Beam Studies Summary
Longitudinal Beam Transfer Function
−45 −40 −35 −30 −25 −20 −15 −10 −5 0−60
−55
−50
−45
−40
−35
−30
−25
−20
−15
Feedback attenuation (dB)
BT
F p
eak
(dB
)
MeasuredEstimated
Open-loop BTF;Shift gain of 0;Shift gain of 1;Shift gain of 2;Shift gain of 3;Shift gain of 4;Shift gain of 5;Shift gain of 6;BTF peak vs. feedbackgain.
Setup Beam Studies Summary
Outline
1 SetupSystem Updates
2 Beam StudiesBeam Transfer FunctionBunch CleaningLongitudinal Feedback on The RampLongitudinal Grow/Damp MeasurementsPost-mortem Data
Setup Beam Studies Summary
Bunch Cleaning, Vertical Plane
After re-tuning checkedbunch cleaning at injectionand at the top of the ramp;With the back-endoptimized see goodisolation bunch-to-bunch;Spelling MLS in Morsecode here.
Setup Beam Studies Summary
Bunch Cleaning, Vertical Plane
After re-tuning checkedbunch cleaning at injectionand at the top of the ramp;With the back-endoptimized see goodisolation bunch-to-bunch;Spelling MLS in Morsecode here.
Setup Beam Studies Summary
Bunch Cleaning, Vertical Plane
After re-tuning checkedbunch cleaning at injectionand at the top of the ramp;With the back-endoptimized see goodisolation bunch-to-bunch;Spelling MLS in Morsecode here.
Setup Beam Studies Summary
Bunch Cleaning, Vertical Plane
15 20 25 30 35 40 45 50 550
50
100
150
200
250
300
Bunch number
Bun
ch c
urre
nt (
arb.
uni
ts)
After re-tuning checkedbunch cleaning at injectionand at the top of the ramp;With the back-endoptimized see goodisolation bunch-to-bunch;Spelling MLS in Morsecode here.
Setup Beam Studies Summary
Outline
1 SetupSystem Updates
2 Beam StudiesBeam Transfer FunctionBunch CleaningLongitudinal Feedback on The RampLongitudinal Grow/Damp MeasurementsPost-mortem Data
Setup Beam Studies Summary
Limiting Factors in the Longitudinal Plane
Found two limiting effects:Downward frequency shift of mode 0 due to beam loading;Synchrotron frequency change from 85 to 105 kHz.
An example from the the ALS;Mode 0 shifts from 12 to4.8 kHz.
Setup Beam Studies Summary
Limiting Factors in the Longitudinal Plane
Found two limiting effects:Downward frequency shift of mode 0 due to beam loading;Synchrotron frequency change from 85 to 105 kHz.
An example from the the ALS;Mode 0 shifts from 12 to4.8 kHz.
Setup Beam Studies Summary
Limiting Factors in the Longitudinal Plane
Found two limiting effects:Downward frequency shift of mode 0 due to beam loading;Synchrotron frequency change from 85 to 105 kHz.
−12 −10 −8 −6 −4 −2 04
5
6
7
8
9
10
11
12
13
14
ℜ (ms−1)
ℑ (
kHz)
400 mA
0 mA
An example from the the ALS;Mode 0 shifts from 12 to4.8 kHz.
Setup Beam Studies Summary
Minimum Delay Filter
0 5 10 15 20 25−1
−0.5
0
0.5
1
Tap number
0 50 100 150 200 250 300 350 400 450 500−30
−20
−10
0
10
20
30
Frequency (kHz)
Gai
n (d
B)
0 50 100 150 200 250 300 350 400 450 500100
120
140
160
180
200
Frequency (kHz)
Pha
se (
deg)
Used a 24 tap filter with nodownsampling;Roughly half synchrotronperiod long;Filter gain peaks around270 kHz, but the beam has noresponse there;Only 14◦ phase shift between85 and 105 kHz;Gain at 25 kHz is 20 dB downand 50◦ away from resistivephase.
Setup Beam Studies Summary
Minimum Delay Filter
0 5 10 15 20 25−1
−0.5
0
0.5
1
Tap number
0 50 100 150 200 250 300 350 400 450 500−30
−20
−10
0
10
20
30
Frequency (kHz)
Gai
n (d
B)
0 50 100 150 200 250 300 350 400 450 500100
120
140
160
180
200
Frequency (kHz)
Pha
se (
deg)
Used a 24 tap filter with nodownsampling;Roughly half synchrotronperiod long;Filter gain peaks around270 kHz, but the beam has noresponse there;Only 14◦ phase shift between85 and 105 kHz;Gain at 25 kHz is 20 dB downand 50◦ away from resistivephase.
Setup Beam Studies Summary
Minimum Delay Filter
0 5 10 15 20 25−1
−0.5
0
0.5
1
Tap number
0 50 100 150 200 250 300 350 400 450 500−30
−20
−10
0
10
20
30
Frequency (kHz)
Gai
n (d
B)
0 50 100 150 200 250 300 350 400 450 500100
120
140
160
180
200
Frequency (kHz)
Pha
se (
deg)
Used a 24 tap filter with nodownsampling;Roughly half synchrotronperiod long;Filter gain peaks around270 kHz, but the beam has noresponse there;Only 14◦ phase shift between85 and 105 kHz;Gain at 25 kHz is 20 dB downand 50◦ away from resistivephase.
Setup Beam Studies Summary
Minimum Delay Filter
0 5 10 15 20 25−1
−0.5
0
0.5
1
Tap number
0 50 100 150 200 250 300 350 400 450 500−30
−20
−10
0
10
20
30
Frequency (kHz)
Gai
n (d
B)
0 50 100 150 200 250 300 350 400 450 500100
120
140
160
180
200
Frequency (kHz)
Pha
se (
deg)
Used a 24 tap filter with nodownsampling;Roughly half synchrotronperiod long;Filter gain peaks around270 kHz, but the beam has noresponse there;Only 14◦ phase shift between85 and 105 kHz;Gain at 25 kHz is 20 dB downand 50◦ away from resistivephase.
Setup Beam Studies Summary
Minimum Delay Filter
0 5 10 15 20 25−1
−0.5
0
0.5
1
Tap number
0 50 100 150 200 250 300 350 400 450 500−30
−20
−10
0
10
20
30
Frequency (kHz)
Gai
n (d
B)
0 50 100 150 200 250 300 350 400 450 500100
120
140
160
180
200
Frequency (kHz)
Pha
se (
deg)
Used a 24 tap filter with nodownsampling;Roughly half synchrotronperiod long;Filter gain peaks around270 kHz, but the beam has noresponse there;Only 14◦ phase shift between85 and 105 kHz;Gain at 25 kHz is 20 dB downand 50◦ away from resistivephase.
Setup Beam Studies Summary
Longitudinal Feedback and Ramping
Minimum turn-on energy is 150 MeV ...... but the lifetime suffers;Converged on feedback turn-on at 200 MeV;Use phase servo to maintain front-end phase detection;Seemed fairly stable in the short testing we haveperformed;Long term experience?
Setup Beam Studies Summary
Longitudinal Feedback and Ramping
Minimum turn-on energy is 150 MeV ...... but the lifetime suffers;Converged on feedback turn-on at 200 MeV;Use phase servo to maintain front-end phase detection;Seemed fairly stable in the short testing we haveperformed;Long term experience?
Setup Beam Studies Summary
Longitudinal Feedback and Ramping
Minimum turn-on energy is 150 MeV ...... but the lifetime suffers;Converged on feedback turn-on at 200 MeV;Use phase servo to maintain front-end phase detection;Seemed fairly stable in the short testing we haveperformed;Long term experience?
Setup Beam Studies Summary
Longitudinal Feedback and Ramping
Minimum turn-on energy is 150 MeV ...... but the lifetime suffers;Converged on feedback turn-on at 200 MeV;Use phase servo to maintain front-end phase detection;Seemed fairly stable in the short testing we haveperformed;Long term experience?
Setup Beam Studies Summary
Longitudinal Feedback and Ramping
Minimum turn-on energy is 150 MeV ...... but the lifetime suffers;Converged on feedback turn-on at 200 MeV;Use phase servo to maintain front-end phase detection;Seemed fairly stable in the short testing we haveperformed;Long term experience?
Setup Beam Studies Summary
Longitudinal Feedback and Ramping
Minimum turn-on energy is 150 MeV ...... but the lifetime suffers;Converged on feedback turn-on at 200 MeV;Use phase servo to maintain front-end phase detection;Seemed fairly stable in the short testing we haveperformed;Long term experience?
Setup Beam Studies Summary
Outline
1 SetupSystem Updates
2 Beam StudiesBeam Transfer FunctionBunch CleaningLongitudinal Feedback on The RampLongitudinal Grow/Damp MeasurementsPost-mortem Data
Setup Beam Studies Summary
Longitudinal Growth Rates vs. Beam Current (1/3)
60 80 100 120 140 160 1801.5
2
2.5
3
3.5
4
4.5
Beam current (mA)
Gro
wth
rat
e (m
s−1 )
MLS Z: Mode 43, threshold 18 mA, zero current damping 1.8 ms
60 80 100 120 140 160 18082.9
82.95
83
83.05
83.1
83.15
Beam current (mA)
Mod
al fr
eque
ncy
(kH
z)
Mode 43 open-loopeigenvalues vs. beam current;Threshold of 18 mA, zerocurrent damping of 1.8 ms;
Setup Beam Studies Summary
Longitudinal Growth Rates vs. Beam Current (1/3)
60 80 100 120 140 160 1801.5
2
2.5
3
3.5
4
4.5
Beam current (mA)
Gro
wth
rat
e (m
s−1 )
MLS Z: Mode 43, threshold 18 mA, zero current damping 1.8 ms
60 80 100 120 140 160 18082.9
82.95
83
83.05
83.1
83.15
Beam current (mA)
Mod
al fr
eque
ncy
(kH
z)
Mode 43 open-loopeigenvalues vs. beam current;Threshold of 18 mA, zerocurrent damping of 1.8 ms;
Setup Beam Studies Summary
Longitudinal Growth Rates vs. Beam Current (2/3)
60 80 100 120 140 160 180
0.8
1
1.2
1.4
1.6
1.8
2
Beam current (mA)
Gro
wth
rat
e (m
s−1 )
MLS Z: Mode 12, threshold 11 mA, zero current damping 7.7 ms
60 80 100 120 140 160 18082.7
82.75
82.8
82.85
82.9
82.95
Beam current (mA)
Mod
al fr
eque
ncy
(kH
z)
Mode 12 open-loopeigenvalues vs. beam current;Threshold of 11 mA, zerocurrent damping of 7.7 ms;
Setup Beam Studies Summary
Longitudinal Growth Rates vs. Beam Current (2/3)
60 80 100 120 140 160 180
0.8
1
1.2
1.4
1.6
1.8
2
Beam current (mA)
Gro
wth
rat
e (m
s−1 )
MLS Z: Mode 12, threshold 11 mA, zero current damping 7.7 ms
60 80 100 120 140 160 18082.7
82.75
82.8
82.85
82.9
82.95
Beam current (mA)
Mod
al fr
eque
ncy
(kH
z)
Mode 12 open-loopeigenvalues vs. beam current;Threshold of 11 mA, zerocurrent damping of 7.7 ms;
Setup Beam Studies Summary
Longitudinal Growth Rates vs. Beam Current (3/3)
60 80 100 120 140 160 1800.5
1
1.5
2
2.5
Beam current (mA)
Gro
wth
rat
e (m
s−1 )
MLS Z: Mode 71, threshold 24 mA, zero current damping 2.6 ms
60 80 100 120 140 160 18082.75
82.8
82.85
82.9
82.95
83
Beam current (mA)
Mod
al fr
eque
ncy
(kH
z)
Mode 71 open-loopeigenvalues vs. beam current;Threshold of 24 mA, zerocurrent damping of 2.6 ms;
Setup Beam Studies Summary
Longitudinal Growth Rates vs. Beam Current (3/3)
60 80 100 120 140 160 1800.5
1
1.5
2
2.5
Beam current (mA)
Gro
wth
rat
e (m
s−1 )
MLS Z: Mode 71, threshold 24 mA, zero current damping 2.6 ms
60 80 100 120 140 160 18082.75
82.8
82.85
82.9
82.95
83
Beam current (mA)
Mod
al fr
eque
ncy
(kH
z)
Mode 71 open-loopeigenvalues vs. beam current;Threshold of 24 mA, zerocurrent damping of 2.6 ms;
Setup Beam Studies Summary
Longitudinal Growth Rates: Historical Comparison
0 20 40 60 80 100 120 140 160 1800
0.5
1
1.5
2
2.5
Beam current (mA)
Gro
wth
rat
e (m
s−1 )
Mode 12
0 20 40 60 80 100 120 140 160 1800
1
2
3
4
5
Beam current (mA)
Gro
wth
rat
e (m
s−1 )
Mode 43
2014−01−102011−11−26
2014−01−102011−11−26
0 20 40 60 80 100 120 140 160 1800
0.5
1
1.5
2
2.5
Beam current (mA)
Gro
wth
rat
e (m
s−1 )
Mode 71
2014−01−102011−11−26
A clear reduction for modes12 and 43, mode 71unchanged.
Setup Beam Studies Summary
Outline
1 SetupSystem Updates
2 Beam StudiesBeam Transfer FunctionBunch CleaningLongitudinal Feedback on The RampLongitudinal Grow/Damp MeasurementsPost-mortem Data
Setup Beam Studies Summary
Beam Loss: Longitudinal Instability
−3 −2.5 −2 −1.5 −1 −0.5 0−1500
−1000
−500
0
500
1000
1500
Time (ms)
AD
C c
ount
s
Longitudinal
−3 −2.5 −2 −1.5 −1 −0.5 0−100
−50
0
50
100
150
Time (ms)
AD
C c
ount
s
Horizontal
−3 −2.5 −2 −1.5 −1 −0.5 0−200
−100
0
100
200
300
400
Time (ms)
AD
C c
ount
s
Vertical
Beam loss due tolongitudinal instability;Relatively slow loss over0.5 ms;Spectrum is dominated bysynchrotron frequency andharmonics;A faint knockout line isvisible;Quadrupole/sextupoleoscillation or harmonics?
Setup Beam Studies Summary
Beam Loss: Longitudinal Instability
−3 −2.5 −2 −1.5 −1 −0.5 0−1500
−1000
−500
0
500
1000
1500
Time (ms)
AD
C c
ount
s
Longitudinal
−3 −2.5 −2 −1.5 −1 −0.5 0−100
−50
0
50
100
150
Time (ms)
AD
C c
ount
s
Horizontal
−3 −2.5 −2 −1.5 −1 −0.5 0−200
−100
0
100
200
300
400
Time (ms)
AD
C c
ount
s
Vertical
Beam loss due tolongitudinal instability;Relatively slow loss over0.5 ms;Spectrum is dominated bysynchrotron frequency andharmonics;A faint knockout line isvisible;Quadrupole/sextupoleoscillation or harmonics?
Setup Beam Studies Summary
Beam Loss: Longitudinal Instability
Beam loss due tolongitudinal instability;Relatively slow loss over0.5 ms;Spectrum is dominated bysynchrotron frequency andharmonics;A faint knockout line isvisible;Quadrupole/sextupoleoscillation or harmonics?
Setup Beam Studies Summary
Beam Loss: Longitudinal Instability
Beam loss due tolongitudinal instability;Relatively slow loss over0.5 ms;Spectrum is dominated bysynchrotron frequency andharmonics;A faint knockout line isvisible;Quadrupole/sextupoleoscillation or harmonics?
Setup Beam Studies Summary
Beam Loss: Longitudinal Instability
Beam loss due tolongitudinal instability;Relatively slow loss over0.5 ms;Spectrum is dominated bysynchrotron frequency andharmonics;A faint knockout line isvisible;Quadrupole/sextupoleoscillation or harmonics?
Setup Beam Studies Summary
Beam Loss: Vertical Oscillation
−12 −10 −8 −6 −4 −2 00
100
200
300
400
500
Time (ms)
AD
C c
ount
s
Longitudinal
−12 −10 −8 −6 −4 −2 0−400
−200
0
200
400
600
800
Time (ms)
AD
C c
ount
s
Horizontal
−12 −10 −8 −6 −4 −2 00
100
200
300
400
Time (ms)
AD
C c
ount
s
Vertical
During ramp down thevertical tune runs into theknockout line;Fast loss — roughly 100turns;The vertical tune shifts to1380 kHz;Fast loss produces multiplespectral features.
Setup Beam Studies Summary
Beam Loss: Vertical Oscillation
−4.08 −4.06 −4.04 −4.02 −4 −3.98 −3.96 −3.94 −3.92 −3.90
100
200
300
400
500
Time (ms)
AD
C c
ount
s
Longitudinal
−4.08 −4.06 −4.04 −4.02 −4 −3.98 −3.96 −3.94 −3.92 −3.9−400
−200
0
200
400
600
800
Time (ms)
AD
C c
ount
s
Horizontal
−4.08 −4.06 −4.04 −4.02 −4 −3.98 −3.96 −3.94 −3.92 −3.90
100
200
300
400
Time (ms)
AD
C c
ount
s
Vertical
During ramp down thevertical tune runs into theknockout line;Fast loss — roughly 100turns;The vertical tune shifts to1380 kHz;Fast loss produces multiplespectral features.
Setup Beam Studies Summary
Beam Loss: Vertical Oscillation
During ramp down thevertical tune runs into theknockout line;Fast loss — roughly 100turns;The vertical tune shifts to1380 kHz;Fast loss produces multiplespectral features.
Setup Beam Studies Summary
Beam Loss: Vertical Oscillation
During ramp down thevertical tune runs into theknockout line;Fast loss — roughly 100turns;The vertical tune shifts to1380 kHz;Fast loss produces multiplespectral features.
Setup Beam Studies Summary
Summary
Successfully updated all systems;Demonstrated longitudinal feedback operation through theenergy ramp and optics transition;Configured and tested post-mortem data acquisition, beamtransfer function measurements, bunch cleaning;Longitudinal growth rates have shifted slightly since 2011.
Setup Beam Studies Summary
Summary
Successfully updated all systems;Demonstrated longitudinal feedback operation through theenergy ramp and optics transition;Configured and tested post-mortem data acquisition, beamtransfer function measurements, bunch cleaning;Longitudinal growth rates have shifted slightly since 2011.
Setup Beam Studies Summary
Summary
Successfully updated all systems;Demonstrated longitudinal feedback operation through theenergy ramp and optics transition;Configured and tested post-mortem data acquisition, beamtransfer function measurements, bunch cleaning;Longitudinal growth rates have shifted slightly since 2011.
Setup Beam Studies Summary
Summary
Successfully updated all systems;Demonstrated longitudinal feedback operation through theenergy ramp and optics transition;Configured and tested post-mortem data acquisition, beamtransfer function measurements, bunch cleaning;Longitudinal growth rates have shifted slightly since 2011.