J. Lack & F. Bogacz -- The Neurophysiology of ADR and Process Design (Neuroawareness)
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![Page 1: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/1.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
Alex Bogacz
Dogbone configuration
orbit separation
simultaneous acceleration of both + - species
12.5 GeV Two-step-Dogbone RLA
Quadrupole focusing scheme – Triplet vs FODO lattices
multi-pass linac optics
‘droplette’ Arcs
matching to the Arcs
5 GeV Dogbone RLA (3.5 pass) – Complete lattice design, sensitivity studies
15 GeV Dogbone RLA (6.5 pass)?
Dogbone RLA – Design Choices
![Page 2: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/2.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
Simultaneous acceleration of both + species
E
E0
E0 + (n+½)E
orbit separation, energy difference between consecutive passes: 2E
![Page 3: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/3.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
12.5 GeV Two-step-Dogbone RLA
2 GeV to 5 GeV 5 GeV to 12.5 GeV
the same energy ratio for both dogbones:
2 GeV0.3 GeV
1 GeV/pass5 GeV
2 GeV/pass12.5 GeV
Ef
E0
= 2.5
![Page 4: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/4.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
12.5 GeV Two-step-Dogbone RLA
2 GeV to 5 GeV 5 GeV to 12.5 GeV
the same energy ratio for both dogbones:
2 GeV0.3 GeV
1 GeV/pass5 GeV
2 GeV/pass12.5 GeV
Ef
E0
= 2.5
![Page 5: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/5.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
Injection double-chicane
900
Wed Apr 26 00:28:03 2006 OptiM - MAIN: - D:\ISS_dogbone\Chicane\Chicane_dogleg.opt
30
0
2-2
BE
TA
_X
&Y
[m]
DIS
P_
X&
Y[m
]
BETA_X BETA_Y DISP_X DISP_Y
![Page 6: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/6.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
Initial beam emittance/acceptance after cooling at 273 MeV/c
Study IIb rmsA = (2.5)2
normalized emittance: x/y mmrad 4.8 30
longitudinal emittance: l
lp z/mc)
momentum spread: p/p
bunch length: z
mm
mm
27
0.07
176
150
0.17
442
![Page 7: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/7.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
Pre-accelerator different style cryo-modules
Short Medium Long
Number of periods 12 18 22
Total length of one period 3 m 5 m 8 m
Number of cavities per period
1 1 2
Number of cells per cavity 1 2 2
Cavity accelerating gradient 15 MV/m 15 MV/m 15 MV/m
Real-estate gradient 3.72 MV/m 4.47 MV/m 5.59 MV/m
Aperture in cavities (2a) 460 mm 460 mm 460 mm
Aperture in solenoids (2a) 460 mm 460 mm 460 mm
Solenoid length 1 m 1 m 1 m
Solenoid maximum field 1.5 T 1.9 T 3.9 T
460
1000
3000
200
1000 500
200 460
1500
5000
250
1000 500
500 500
460 1500
8000
1500 250
1000 500
500 500
![Page 8: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/8.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
Introduction of synchrotron motion in the initial part of the linac
0 100 200 3000
10
20
30
40
50
60
70
80
90
s[m]
RF
pha
se [
deg]
0 100 200 3000
1
2
s [m]
Syn
chro
tron
pha
se/2
PI
100 0 100
0.2
0
0.2
Phase [deg]
Dp/
p
0 50 100 150 200 250 3000
0.5
1
1.5
2
s [m]
Ene
rgy
[GeV
]
p/p=0.17or =93 (200MHz)
![Page 9: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/9.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
25-25 S [cm] View at the lattice end
20
0-2
00
dP
/P *
10
00
,
25-25 S [cm] View at the element 275
20
0-2
00
dP
/P *
10
00
,
Linear Pre-accelerator – Longitudinal dynamics
25-25 S [cm] View at the lattice beginning
20
0-2
00
dP
/P *
10
00
,
3020
Fri Dec 03 11:22:15 2004 OptiM - MAIN: - D:\Study 2A\PreLinac\Linac_sol.opt
25
0
30
-90
Be
tatr
on
siz
e X
&Y
[cm
]
An
gle
[de
g][
-90
,+9
0]
a b Angle[deg]
![Page 10: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/10.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
Symmetric ‘Dogbone’ RLA (3.5-pass) Scheme
Main Linac (2 GeV/pass)
3 ‘droplet’ Arcs based on periodic cells (900 betatron phase advance per cell)
Dogbone RLA - footprint
-5000
-3000
-1000
1000
3000
5000
-15000 -10000 -5000 0 5000 10000 15000 20000 25000 30000 35000
z [cm]
x [cm]
![Page 11: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/11.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
120
Mon Aug 28 23:06:16 2006 OptiM - MAIN: - D:\RLA explore\Cells\Triplet.opt
300
50
BE
TA_X
&Y
[m]
DIS
P_X
&Y
[m]
BETA_X BETA_Y DISP_X DISP_Y120
Mon Aug 28 23:09:19 2006 OptiM - MAIN: - D:\RLA explore\Cells\FODO.opt
30
0
50
BE
TA_
X&
Y[m
]
DIS
P_
X&
Y[m
]
BETA_X BETA_Y DISP_X DISP_Y
FODO vs Triplet focusing structure
FODO Triplet
Advantages:
much weaker quads (~3 times)shorter quads (total)easier chromaticity correction
Advantages:
longer straight sectionssmaller vertical beta-functionuniform variation of betas and
dispersion
The same length
The same phase advance per cell (x= 900 = y)
![Page 12: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/12.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design ChoicesTriplet - ‘flat focusing' linac profile
‘half pass’ , 2-3 GeV
1-pass, 3-5 GeV
mirror symmetry cond. (outn = in
n+1,and outn = -in
n+1, n - pass index)
Initial phase adv/cell 90 deg – constant quad grarients for the entire linac
phase adv. drops much faster in the horizontal plane
124.310
Mon Aug 28 23:31:09 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_Triplet\flat\Linac05.opt
0.5
0P
HA
SE
_X
&Y
Q_X Q_Y
124.310
Mon Aug 28 23:29:40 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_Triplet\flat\Linac05.opt
30
0
50
BE
TA_
X&
Y[m
]
DIS
P_
X&
Y[m
]
BETA_X BETA_Y DISP_X DISP_Y
256.820
Mon Aug 28 23:36:36 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_Triplet\flat\Linac1.opt
0.5
0P
HA
SE
_X
&Y
Q_X Q_Y
256.820
Mon Aug 28 23:35:11 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_Triplet\flat\Linac1.opt
60
0
50
BE
TA
_X
&Y
[m]
DIS
P_
X&
Y[m
]
BETA_X BETA_Y DISP_X DISP_Y
![Page 13: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/13.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices Triplet - ‘flat focusing' linac profile
2-pass, 5-7 GeV
3-pass, 7-9 GeV
mirror symmetry cond. (outn = in
n+1,and outn = -in
n+1, n - pass index)
256.820
Mon Aug 28 23:40:53 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_Triplet\flat\Linac2.opt
0.5
0P
HA
SE
_X
&Y
Q_X Q_Y
256.820
Mon Aug 28 23:39:54 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_Triplet\flat\Linac2.opt
12
00
50
BE
TA
_X
&Y
[m]
DIS
P_
X&
Y[m
]
BETA_X BETA_Y DISP_X DISP_Y
256.820
Mon Aug 28 23:44:16 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_Triplet\flat\Linac3.opt
0.5
0P
HA
SE
_X
&Y
Q_X Q_Y
256.820
Mon Aug 28 23:43:18 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_Triplet\flat\Linac3.opt
12
00
50
BE
TA
_X
&Y
[m]
DIS
P_
X&
Y[m
]
BETA_X BETA_Y DISP_X DISP_Y
phase adv. drops much faster in the horizontal plane
no phase adv. in the horizontal plane
![Page 14: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/14.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design ChoicesFODO - ‘flat focusing' linac profile
‘half pass’ , 2-3 GeV
1-pass, 3-5 GeV
mirror symmetry cond. (outn = in
n+1,and outn = -in
n+1, n - pass index)
initial phase adv/cell 90 deg – fixed gradient in all cells
phase adv. drifting uniformly in both planes
122.150
Mon Aug 28 09:15:16 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_FODO\flat\Linac05.opt
0.5
0P
HA
SE
_X
&Y
Q_X Q_Y
248.6510
Mon Aug 28 09:18:21 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_FODO\flat\Linac1.opt
0.5
0P
HA
SE
_X
&Y
Q_X Q_Y
248.6510
Mon Aug 28 09:16:24 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_FODO\flat\Linac1.opt
30
0
50
BE
TA
_X
&Y
[m]
DIS
P_
X&
Y[m
]
BETA_X BETA_Y DISP_X DISP_Y
122.150
Mon Aug 28 09:13:44 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_FODO\flat\Linac05.opt
30
0
50
BE
TA_
X&
Y[m
]
DIS
P_
X&
Y[m
]
BETA_X BETA_Y DISP_X DISP_Y
![Page 15: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/15.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices FODO - ‘flat focusing' linac profile
2-pass, 5-7 GeV
3-pass, 7-9 GeV
mirror symmetry cond. (outn = in
n+1,and outn = -in
n+1, n - pass index)
248.6510
Mon Aug 28 09:21:27 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_FODO\flat\Linac2.opt
0.5
0P
HA
SE
_X
&Y
Q_X Q_Y
248.6510
Mon Aug 28 09:20:00 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_FODO\flat\Linac2.opt
60
0
50
BE
TA_
X&
Y[m
]
DIS
P_
X&
Y[m
]
BETA_X BETA_Y DISP_X DISP_Y
248.6510
Mon Aug 28 09:30:55 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_FODO\flat\Linac3.opt
0.5
0P
HA
SE
_X
&Y
Q_X Q_Y
248.6510
Mon Aug 28 09:30:00 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_FODO\flat\Linac3.opt
60
0
50
BE
TA
_X
&Y
[m]
DIS
P_
X&
Y[m
]
BETA_X BETA_Y DISP_X DISP_Y
![Page 16: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/16.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices FODO - ‘flat focusing' linac profile
4-pass, 9-11 GeV
5-pass, 11-13 GeV
mirror symmetry cond. (outn = in
n+1,and outn = -in
n+1, n - pass index)
248.6510
Mon Aug 28 09:38:19 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_FODO\flat\Linac4.opt
0.5
0P
HA
SE
_X
&Y
Q_X Q_Y
248.6510
Mon Aug 28 09:37:37 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_FODO\flat\Linac4.opt
90
0
50
BE
TA
_X
&Y
[m]
DIS
P_
X&
Y[m
]
BETA_X BETA_Y DISP_X DISP_Y
248.6510
Mon Aug 28 09:43:05 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_FODO\flat\Linac5.opt
0.5
0P
HA
SE
_X
&Y
Q_X Q_Y
248.6510
Mon Aug 28 09:42:15 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_FODO\flat\Linac5.opt
90
0
50
BE
TA
_X
&Y
[m]
DIS
P_
X&
Y[m
]
BETA_X BETA_Y DISP_X DISP_Y
![Page 17: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/17.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices ‘flat focusing' linac profile
6-pass, 13-15 GeV
mirror symmetry cond. (outn = in
n+1,and outn = -in
n+1, n - pass index)
248.6510
Mon Aug 28 09:49:14 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_FODO\flat\Linac6.opt
0.5
0P
HA
SE
_X
&Y
Q_X Q_Y
248.6510
Mon Aug 28 09:48:09 2006 OptiM - MAIN: - D:\RLA explore\Dogbone_FODO\flat\Linac6.opt
90
0
50
BE
TA_
X&
Y[m
]
DIS
P_
X&
Y[m
]
BETA_X BETA_Y DISP_X DISP_Y
![Page 18: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/18.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
Phase slippage in the linac
avk
1
Ncavi
b k ib k i 1
Ebk i 1
b k ih
360
1
2
m
Ebk i
2
Ebk i h Ek
Ef0 Ea0
b7 0 0b5 0 0b3 0 0b1 0 0
b6 0 0b4 0 0b2 0 0b0 0 0Ebk 0 Eak mb k 0 0
i 0 Ncav 1hLlinac
Ncav
Ek
Eak 1 Eak
Llinac
j 0 8Ncav 80k 0 7Llinac 24000
0 1 104
2 104
20
0
20
s [m]
RF
pha
se [
deg]
0 1 104
2 104
3 104
0
5
10
s [m]
RF
pha
se [
deg]
1refi
b2 i 2refi
b3 i
E0 = 2 GeV E0 = 2 GeV
![Page 19: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/19.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
Arc 1 Layout
Arc dipoles
$Lb=150; => 150 cm$ang0=10.3283; => 10.328 deg$Nin=16; => 16$Nout=2; => 2$ang=(90+$ang0)/($Nin-2*$Nout); => 8.36 deg.#$Ang_out=$ang0+2*$Nout*$ang; => 43.77 deg.$Ang_in=2*$Nin*$ang; => 267.54 deg.
$BP=$PI*$Hr*$ang/(180*$Lb); => 6.537
kGauss
$Lring=227.3 m
footprint
-5000
-4000
-3000
-2000
-1000
0
1000
2000
3000
4000
5000
0 2000 4000 6000 8000 10000
z [cm]
x [cm]
![Page 20: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/20.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
Droplet Arc – Optics ‘Building Blocks’
900 phase advance/cell: inward and outward cells, missing dipole, empty cells
90
Fri Dec 03 13:23:10 2004 OptiM - MAIN: - D:\Study 2A\Droplette\A_out.opt
30
0
3-3
BE
TA
_X
&Y
[m]
DIS
P_
X&
Y[m
]BETA_X BETA_Y DISP_X DISP_Y 90
Fri Dec 03 13:24:34 2004 OptiM - MAIN: - D:\Study 2A\Droplette\A_out.opt
30
0
3-3
BE
TA_
X&
Y[m
]
DIS
P_
X&
Y[m
]
BETA_X BETA_Y DISP_X DISP_Y
90
Fri Dec 03 13:27:09 2004 OptiM - MAIN: - D:\Study 2A\Droplette\L_out.opt
30
0
3-3
BE
TA_
X&
Y[m
]
DIS
P_
X&
Y[m
]
BETA_X BETA_Y DISP_X DISP_Y 4536
Fri Dec 16 13:01:21 2005 OptiM - MAIN: - D:\Study 2A\Droplette\SprTr.opt
30
0
3-3
BE
TA
_X
&Y
[m]
DIS
P_
X&
Y[m
]
BETA_X BETA_Y DISP_X DISP_Y
footprint
-5000
-4000
-3000
-2000
-1000
0
1000
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Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
237.30
Fri Jan 20 13:16:02 2006 OptiM - MAIN: - M:\acc_phys\bogacz\ISS_dogbone\Lattice\Arc1.opt
0.5
0P
HA
SE
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&Y
Q_X Q_Y
Arc 1 – Mirror-symmetric Optics
dipoles (2 per cell)
$Lb=150; => 150 cm$ang0=10.3283 deg
$ang=(90+$ang0)/($Nin-2*$Nout); =>
8.36 deg
$B=$PI*$Hr*$ang/(180*$Lb); => 6.537
kGauss
quadrupoles (triplet):L[cm] G[kG/cm] 68 -0.326125 0.328 68 -0.326
16 cells2 cells 2 cells
(out = in ,and out = -in , matched to the linacs)
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Fri Jan 20 13:12:52 2006 OptiM - MAIN: - M:\acc_phys\bogacz\ISS_dogbone\Lattice\Arc1.opt
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$Nout=2, need minimum of 3 triplets to match 6 Twiss parameters
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Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
Straight-Arc Periodic transition
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Wed Nov 30 01:22:41 2005 OptiM - MAIN: - D:\ELIC\Figure-8\tran.opt
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FODO
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Wed Dec 07 10:30:44 2005 OptiM - MAIN: - D:\ELIC\Figure-8\FODO\low_emitt\spr_in.opt
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Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
15 GeV Dogbone RLA (6.5 pass)
energy ratio:
2 GeV0.3 GeV
Ef
E0
= 7.5
2 GeV/pass15 GeV
![Page 24: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/24.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
15 GeV Dogbone RLA (6.5 pass)
energy ratio:
2 GeV0.3 GeV
Ef
E0
= 7.5
2 GeV/pass15 GeV
![Page 25: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/25.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
Beam Separation Switchyard
footprint
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13 GeV
![Page 26: Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz, Dogbone RLA – Design.](https://reader035.fdocuments.in/reader035/viewer/2022062803/56649f3c5503460f94c5bd66/html5/thumbnails/26.jpg)
Operated by the Jefferson Science Associates for the U.S. Depart. Of Energy
Thomas Jefferson National Accelerator Facility NuFact’06, UC Irvine, August 29, 2006.
Alex Bogacz, Dogbone RLA – Design Choices
Summary
‘Dogbone’ RLA – preferred configuration better orbir separation for higher passes
offers symmetric solution for simultaneous acceleration of + and -
FODO lattice more favorable (compared to the triplet) to
accommodate large number of passesuniform phase advance decrease in both planes
smaller variation of Twiss function – easier match to the Arcs
Proposed 12.5 GeV two-step-dogbone RLA (30 mm rad
acceptance)
3.5 pass 5 GeV Dogbone (triplet lattices) – error sensitivity studiesMagnet misalignment error analysis (DIMAD Monte Carlo on the above
lattice) shows quite manageable level of orbit distortion for ~1 mm
level of magnet misalignment error.
Great focusing errors tolerance for the presented lattice 1% of Arc-to-
Arc betatron mismatch limit sets the quadrupole field spec at 0.2%
Aggressive 15 GeV dogbone RLA