0 20 40 60 80 100 120 140 0.000000E+00 5.000000E+10 1.000000E+11 1.500000E+11 2.000000E+11 2.500000E+11 3.000000E+11 Protons No beam Beam “tuning” 20, 30, 10 MV/m 800 psi reduced intensity Longer RF/beam pulse 20, 30, 10 MV/m 950 psi reduced intensity
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0 20 40 60 80 100 120 1400.000000E+00
5.000000E+10
1.000000E+11
1.500000E+11
2.000000E+11
2.500000E+11
3.000000E+11
Protons
No beam
Beam “tuning”
20, 30, 10 MV/m 800 psi reduced intensity
Longer RF/beam pulse
20, 30, 10 MV/m 950 psi reduced intensity
Max V
Min V
1/e * (Max V – Min V)
RF pickup signal (200 ps/pt averaged over 100 pts), 7.5 µs beam
τ Time (µs)
Pick
up v
olta
ge (V
)
Ratio
of m
inim
um p
icku
p vo
ltage
to
max
imum
pic
kup
volta
ge (a
rb. U
nits
)
Beam “tuning”
20 MV/mReducedintensity
30 MV/mReducedintensity
10 MV/mReducedintensity
20 MV/m longer pulse length, full intensity
800 psi H2
950 psi H2
20 MV/m reduced intensity
30 MV/m reduced intensity + freq. mod.
10 MV/m reduced intensity
20 MV/m reduced intensity
Pulse number
Voltage in the cavity with beam
July 25th, 14:43:23, 800 psi H2, 27.8 MV/m, full beam intensity
0.020272 0.0040544 3.0408E-08 1.900500E+11Voltage Current Charge Protons
0 20 40 60 80 100 120 1400.000000E+00
5.000000E+10
1.000000E+11
1.500000E+11
2.000000E+11
2.500000E+11
3.000000E+11
Protons
0 20 40 60 80 100 120 1400.000000E+00
5.000000E+10
1.000000E+11
1.500000E+11
2.000000E+11
2.500000E+11
3.000000E+11
Protons
July 25th, 15:12:38, 800 psi H2, 20 MV/m, reduced beam intensity
0.00510530.00102107 7.65801E-09 4.786256E+10Voltage Current Charge Protons
July 25th, 800 psi H2, 20 MV/m, reduced beam intensity
Before RF “problem” After RF “problem”
Min
pic
kup
V / m
ax p
icku
p V
(arb
. uni
ts)
Pulse number
July 25th, 15:51:47, 800 psi H2, 30 MV/m, reduced beam intensity
0 20 40 60 80 100 120 1400.000000E+00
5.000000E+10
1.000000E+11
1.500000E+11
2.000000E+11
2.500000E+11
3.000000E+11
Protons
Voltage Current Charge Protons
0.0050233 0.00100466 7.53498E-09 4.709363E+10
July 25th, 800 psi H2, 30 MV/m, reduced beam intensity
Min
pic
kup
V / m
ax p
icku
p V
(arb
. uni
ts)
Pulse number
July 25th, 16:06:08, 800 psi H2, 10 MV/m, reduced beam intensity
0 20 40 60 80 100 120 1400.000000E+00
5.000000E+10
1.000000E+11
1.500000E+11
2.000000E+11
2.500000E+11
3.000000E+11
Protons
Voltage Current Charge Protons0.0043726 0.00087451 6.55884E-09 4.099275E+10
July 25th, 800 psi H2, 10 MV/m, reduced beam intensity
Min
pic
kup
V / m
ax p
icku
p V
(arb
. uni
ts)
Pulse number
0 20 40 60 80 100 120 1400.000000E+00
5.000000E+10
1.000000E+11
1.500000E+11
2.000000E+11
2.500000E+11
3.000000E+11
Protons
July 25th, 16:18:59, 800 psi H2, 20 MV/m, full beam intensity, longer RF pulse
0.0242643 0.00485286 3.63965E-08 2.274778E+11Voltage Current Charge Protons
July 25th, 16:25:18, 800 psi H2, 20 MV/m, full beam intensity, longer beam length &RF pulse
0 20 40 60 80 100 120 1400.000000E+00
5.000000E+10
1.000000E+11
1.500000E+11
2.000000E+11
2.500000E+11
3.000000E+11
Protons
0.0243985 0.0048797 3.65978E-08 2.287359E+11Voltage Current Charge Protons
Min
pic
kup
V / m
ax p
icku
p V
(arb
. uni
ts)
Pulse number
July 25th, 800 psi H2, 20 MV/m, full beam intensity, longer beam length &RF pulse
July 25th, 16:41:04, 950 psi H2, 20 MV/m, full beam intensity
0 20 40 60 80 100 120 1400.000000E+00
5.000000E+10
1.000000E+11
1.500000E+11
2.000000E+11
2.500000E+11
3.000000E+11
Protons
Voltage Current Charge Protons0.0240408 0.00480816 3.60612E-08 2.253825E+11
July 25th, 16:45:16, 950 psi H2, 20 MV/m, reduced beam intensity
0 20 40 60 80 100 120 1400.000000E+00
5.000000E+10
1.000000E+11
1.500000E+11
2.000000E+11
2.500000E+11
3.000000E+11
Protons
Voltage Current Charge Protons0.0061612 0.00123225 9.24186E-09 5.776163E+10
July 25th, 950 psi H2, 20 MV/m, reduced beam intensity
Min
pic
kup
V / m
ax p
icku
p V
(arb
. uni
ts)
Pulse number
July 25th, 16:54:44, 950 psi H2, 30 MV/m, reduced beam intensity
0 20 40 60 80 100 120 1400.000000E+00
5.000000E+10
1.000000E+11
1.500000E+11
2.000000E+11
2.500000E+11
3.000000E+11
Protons
Voltage Current Charge Protons0.0042756 0.00085512 6.41343E-09 4.008394E+10
July 25th, 950 psi H2, 30 MV/m, reduced beam intensity, frequency modulation
Min
pic
kup
V / m
ax p
icku
p V
(arb
. uni
ts)
Pulse number
July 25th, 17:11:32, 950 psi H2, 10 MV/m, reduced beam intensity
0 20 40 60 80 100 120 1400.000000E+00
5.000000E+10
1.000000E+11
1.500000E+11
2.000000E+11
2.500000E+11
3.000000E+11
Protons
Voltage Current Charge Protons0.0052771 0.00105542 7.91562E-09 4.947263E+10
July 25th, 17:11:32, 950 psi H2, 10 MV/m, reduced beam intensity
Min
pic
kup
V / m
ax p
icku
p V
(arb
. uni
ts)
Pulse number
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