Transcript kbb2b.euronu.odp - Center for Advanced Studies of Accelerators

Progress on the Linac and RLAs
Alex Bogacz, Vasiliy Morozov, Yves Roblin, Jefferson Lab
Kevin Beard, Muons Inc.
Morteza Aslaninejad, Cristian Bontoiu, Jürgen Pozimski
Imperial College
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
Linac and RLAs – ‘Big picture’
1st part of this talk
0.9 GeV
244 MeV
2nd part of this talk
146 m
79 m
0.6 GeV/pass
3.6 GeV
264 m
12.6 GeV
2 GeV/pass
IDS Goals:
Define beamlines/lattices for all components
Resolve physical interferences, beamline crossings etc
Error sensitivity analysis
End-to-end simulation (machine acceptance)
Component count and costing
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
EUROnu Jan. 2011
RLA Lattice Studies - Status
Presently completed lattices
Linear pre-accelerator – solenoid focusing
4.5 pass Dogbone RLA × 2 (RLA I + RLA II)
Optimized multi-pass linac optics (bisected - quad profile along the
linac)
Droplet return arcs (4) matched to the linacs
Transfer lines between the components – injection chicanes
Droplet arcs crossing – Double achromat Optics design
Chromatic corrections with sextupoles at Spr/Rec junctions
Error analysis for the Arc lattices (proof-or-principle)
Magnet misalignment tolerance – DIMAD Monte Carlo Simulation
Focusing errors tolerance – betatron mismatch sensitivity
Piece-wise end-to-end simulation with OptiM (pre-accelerator +
RLA I)
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
EUROnu Jan. 2011
Muon Acceleration MiniFeb 2-5, 2010
workshop
http://casa.jlab.org/external/2010/MuonAcceleration_MiniWorkshop/
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
Solenoid Linac (244 -909 MeV)
OptiM - MAIN: - D:\IDS\PreLinac\Sol\Linac_sol.opt
DISP_X&Y[m]
BETA_X&Y[m]
12
5
Sat Dec 13 22:36:02 2008
Transverse acceptance (normalized): (2.5) 2eN = 30 mm rad
0
0
Longitudinal acceptance: (2.5)2 sDpsz/mmc = 150 mm
0
BETA_X
BETA_Y
DISP_X
DISP_Y
146
6 short cryos
8 medium cryos
11 long cryos
15 MV/m
17 MV/m
17 MV/m
1.1 Tesla solenoid
2.4 Tesla solenoid
1.4 Tesla solenoid
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
EUROnu Jan. 2011
Linac – tracking studies
DONE SO
FAR:
shielded two-shell solenoid modeled with POISSON
RF cavities modeled with SUPERFISH, COMSOL, & CST
front-to-end lattice for OptiM (solenoids, dipoles, quadrupoles,
& sextupoles)
linac lattice tested in MAD-X
beam tracking using GPT
optical match of linac to cooling channel with one solenoid
beam-loading effects evaluated as negligible
standard for exchanging data files proposed
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
EUROnu Jan. 2011
Solenoid Model (Superfish)
shield
outer coil
inner coil
‘Soft-edge’ Solenoid
￩
￦s - L ￶
1 ￪
2 ￶
Bz (s) = B0 1 - tanh ￶
2 ￪
￶ a ￶
￨
￶
￫
2 ﾥ
￶ k 2a
1 ￦e ￶ ￦ 2
2
F edge = ￶ ￶ ￶ ￶Bz (s) ds - B0 L ￶= 2 ￨ pc ￶ ￨- ﾥ
8
￶
k=
e
B0
pc
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
EUROnu Jan. 2011
Two-cell cavity (201 MHz) –
COMSOL
Morteza Aslaninejad
Cristian Bontoiu
Jürgen Pozimski
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
EUROnu Jan. 2011
Linac-RLA Acceptance
80
180
Initial phase-space after the cooling channel at 220 MeV/c
-180
-80
bg = 2.08
X`[mrad]
ax,y = -0.356
dP/P * 1000,
bx,y = 2.74 m
-20
X [cm]
View at the lattice beginning
20
-40
S [cm]
View at the lattice beginning
40
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
EUROnu Jan. 2011
EUROnu Jan.
2011
Linac Optics – Beam envelopes
OptiM - MAIN: - C:\Working\IDS\PreLinac\Linac_sol.opt
0
Size_Y[cm]
0
0
Size_X[cm]
30
30
Thu Apr 08 13:54:52 2010
Ax_bet
Ay_bet
Ax_disp
Ay_disp
146
Transverse acceptance (normalized): (2.5) 2eN = 30 mm rad
Longitudinal acceptance: (2.5)2 sDpsz/mmc = 150 mm
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
Linac Optics – OptiM vs ELEGANT
OptiM - MAIN: - D:\IDS\PreLinac\Sol\Linac_sol.opt
DISP_X&Y[m]
0
a = 19.5 cm
0
BETA_X&Y[m]
12
5
Sat Dec 13 22:36:02 2008
0
BETA_X
BETA_Y
DISP_X
DISP_Y
146
a = 19.5 cm
Yves Roblin
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
EUROnu Jan. 2011
Longitudinal phase-space tracking
150
MATHCAD
OptiM
-150
150
dP/P * 1000,
Initial distribution
-30
Alex Bogacz
S [cm]
View at the lattice end30
ELEGANT
MATLAB
-150
dP/P * 1000,
Kevin Beard
-30
S [cm]
View at the lattice beginning
30
Yves Roblin
Morteza Aslaninejad
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
EUROnu Jan. 2011
Cooling Channel – Linac Optics
b
B||
a
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
EUROnu Jan. 2011
GPT Particle Tracking in the Linac
cooling -> upper linac
upper -> middle linac
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
EUROnu Jan. 2011
Linac and RLAs - ‘field map’ tracking
TO DO NEXT:
Include cavity filling effect on accelaration
Get a more accurate initial distribution
Design an improved cooling-to-linac section
Upgrade analytic cavity phasing – check against GPT
Complete linac lattice via tuning solenoids, phasing cavities, &
tracking with GPT
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
EUROnu Jan. 2011
Linac-to-Arc – Chromatic Compensation
E =1.8 GeV
15
DISP_X
DISP_Y
36.9103
0
-3
BETA_Y
-3
0
BETA_X
DISP_X&Y[m]
DISP_X&Y[m]
BETA_X&Y[m]
BETA_X&Y[m]
0
0
OptiM - MAIN: - D:\IDS\Arcs\Arc2_match.opt
3
Wed Jun 11 14:08:34 2008
OptiM - MAIN: - D:\IDS\Linacs_short\Linac1_fudg.opt
3
15
Wed Jun 11 13:14:37 2008
BETA_X
BETA_Y
DISP_X
DISP_Y
72
‘Matching quads’ are invoked
No 900 phase adv/cell maintained across the ‘junction’
Chromatic corrections needed – two pairs of sextupoles
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
EUROnu Jan. 2011
Linac-to-Arc - Chromatic Corrections
initial
two families of sextupoles
-30
X [cm]
View at the
30 lattice beginning
80
X`[mrad]
-30
X [cm]
-80
-80
-80
X`[mrad]
X`[mrad]
80
80
uncorrected
View at the lattice
30 end
-30
X [cm]
View at the
30 lattice end
BETA_X BETA_Y DISP_X
DISP_Y
36.9103
0
3
DISP_X&Y[m]
-3
0
-3
0
0
DISP_X&Y[m]
BETA_X&Y[m]
BETA_X&Y[m]
15
15
Wed Jun 11 14:08:34 2008 OptiM - MAIN: - D:\IDS\Arcs\Arc2_match.opt
Wed Jun 11 13:14:37 2008 OptiM - MAIN: - D:\IDS\Linacs_short\Linac1_fudg.opt
BETA_X
BETA_Y
DISP_X
DISP_Y
72
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
EUROnu Jan. 2011
Mirror-symmetric ‘Droplet’ Arc – Optics
OptiM - MAIN: - D:\IDS\Arcs\Arc1.opt
15
3
Tue Jun 10 21:14:41 2008
(b out = b in and aout = -ain , matched to the linacs)
0
-3
DISP_X&Y[m]
BETA_X&Y[m]
E =1.2 GeV
0
BETA_X
2 cells out
BETA_Y
DISP_X
DISP_Y
130
transition
transition
10 cells in
2 cells out
300
300
footprint
5000
4000
3000
2000
0
0
2000
4000
6000
-1000
8000
10000
dP/P * 1000,
dP/P * 1000,
1000
x [cm ]
-2000
-3000
S [cm]
View at the lattice end
40
-300
-300
-4000
-40
-5000
z [cm ]
-40
S [cm]
View at the lattice beginning
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
EUROnu Jan. 2011
40
EUROnu Jan.
2011
Multi-pass FFAG Arc
2 or more passes through the same arc
e.g. 5 GeV and 9 GeV
NS-FFAG arc lattice design
Achromatic basic cell with 90 horizontal
Basic cell
phase advance
Automatic matching between inward and
outward bending cells
Linear optics understood
Need to incorporate sextupole and
higher-order field components to
accommodate higher momenta
dispersion
exa
ries
o
t
c
e
traj
e
l
p
m
Vasiliy Morozov
COSY Infinity
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
IDS-NF 5-th Plenary Mtg. Fermilab, April 9, 2010
EUROnu Jan.
2011
Multi-pass FFAG Arc
Vasiliy Morozov
simple closing of geometry
when using similar cells
r = 38.5 meters
300
60
C = 302 meters
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
IDS-NF 5-th Plenary Mtg. Fermilab, April 9, 2010
Proposed SDDS Exchange Format
http://casa.jlab.org/external/2010/MuonAcceleration_MiniWorkshop/SDDS/draft.html
•ZGOUBI
•ELEGANT
•G4beamline
•ICOOL
•OptiM
•COSY-Infinity
•MAD-X
•GPT
•…
Kevin Beard
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
EUROnu Jan. 2011
Summary
Critical components of front-end linac modeled
Initial design of the front-end linac simulated
Design matching sections simulated
RLA arc lattice + chromaticity compensation simulated
Putting the pieces together for end-to-end simulations
Multi-pass (2) FFAG Arcs?
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
EUROnu Jan. 2011
Recent Progress
Recent Progress
on the Linac and RLAs
on the Linac and RLAs
Kevin B. Beard,
Muons,Inc.
&
Alex Bogacz, V.Morozov, Y.Roblin
Jefferson Lab
LEMC2009 workshop 8-12 Jun 2009
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
Recent Progress
on the Linac and RLAs
244
Me
V
146 m
0.9
GeV
79 m
0.6
3.6
GeV/ GeV 2
GeV/
pass
pass
264 m
12.6
GeV
LEMC2009 workshop 8-12 Jun 2009
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
Linear Pre-accelerator – 244 MeV to 909
MeV
DISP_X&Y [m]
BETA _X&Y [m]
12
5
Sat Dec 13 22: 36: 02 2008 OptiM - MAIN: - D: \IDS\PreLinac\Sol\Linac_sol.opt
Transverse acceptance (normalized): (2.5) 2= 30 mm rad
0
0
Longitudinal acceptance: (2.5)2 pz/mc= 150 mm
0
BETA_X
BETA_Y
DISP_X
DISP_Y
146
6 short cryos
8 medium cryos
11 long cryos
15 MV/m
17 MV/m
17 MV/m
3m
1.1 Tesla solenoid
5m
1.4 Tesla solenoid
8m
2.4 Tesla solenoid
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
Mini-workshop on Low Energy Muon Acceleration, CNU, February 2-5 , 2010
Why another simulation?
• OptiM – fast, interactive, design, matrix based 0th
order design tool, symplectic soft edge solenoids, very
good at tuning (free)
• GPT – good at tracking ($)
• G4beamline – tracking, Geant4 particle decays &
interactions, energy depositions, showers, etc., not so
good at tuning (free & open source) (v2.06)
•http://g4beamline.muonsinc.com
LEMC2009 workshop 8-12 Jun 2009
Sep 14, 2010
Operated by JSA for the U.S. Department of Energy
Muons, Inc.
LEMC2009 workshop 8-12 Jun 2009
Aug 31, 2010
Operated by JSA for the U.S. Department of Energy
Muons, Inc.
G4beamline input file z18.in
...
# The "default" physics list is QGSP_BERT
physics QGSP_BERT disable=Decay
###################### begin: common info #################################
# physical constants:
param deg=3.14159/180.
param muonmass=105.658
param c_mm_nS=299.792
...
upperCryomodule $Zcryo1 $j1
upperCryomodule $Zcryo2 $j2
upperCryomodule $Zcryo3 $j3
upperCryomodule $Zcryo4 $j4
upperCryomodule $Zcryo5 $j5
upperCryomodule $Zcryo6 $j6
center
solenoid
RF timing
$Toff1 $kill1
$Toff2 $kill2
$Toff3 $kill3
$Toff4 $kill4
$Toff5 $kill5
$Toff6 $kill6
Only 534 non-comment
lines, produces 244 virtual
detectors, 25 cryomodules
middleCryomodule $Zcryo7 $j7 $Toff7 $kill7
middleCryomodule $Zcryo8 $j8 $Toff8 $kill8
middleCryomodule $Zcryo9 $j9 $Toff9 $kill9
middleCryomodule $Zcryo10 $j10 $Toff10 $kill10
middleCryomodule $Zcryo11 $j11 $Toff11 $kill11
middleCryomodule $Zcryo12 $j12 $Toff12 $kill12
middleCryomodule $Zcryo13 $j13 $Toff13 $kill13
middleCryomodule $Zcryo14 $j14 $Toff14 $kill14
lowerCryomodule
lowerCryomodule
lowerCryomodule
lowerCryomodule
lowerCryomodule
lowerCryomodule
lowerCryomodule
...
$Zcryo15 $j15 $Toff15a $Toff15b $kill15
$Zcryo16 $j16 $Toff16a $Toff16b $kill16
$Zcryo17 $j17 $Toff17a $Toff17b $kill17
$Zcryo18 $j18 $Toff18a $Toff18b $kill18
$Zcryo19 $j19 $Toff19a $Toff19b $kill19
$Zcryo20 $j20 $Toff20a $Toff20b $kill20
$Zcryo21 $j21 $Toff21a $Toff21b $kill21
Muons, Inc.
beam stop
LEMC2009 workshop 8-12 Jun 2009
Operated by JSA for the U.S. Department of Energy
Sep 14, 2010
Muons, Inc.
Conclusions
model is working well
and in general agreement with other
simulations
•Essential step toward our long term
goal of complete end-to-end simulations
•Fine tuning is still in progress
•Will soon begin particle interactions
with the hardware
•
LEMC2009 workshop 8-12 Jun 2009
•
Muons, Inc.
Sep 14, 2010
• G4beamline
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
Ez
Ez
LEMC2009 workshop 8-12 Jun 2009
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
Aug 31, 2010
Muons, Inc.
phases partially
adjusted
phases from
spreadsheet
LEMC2009 workshop 8-12 Jun 2009
Aug 31, 2010
Operated by JSA for the U.S. Department of Energy
Muons, Inc.
Comparison of GPT, OptiM, g4beamline
GPT
KE[MeV]
z[cm]
G4beamline
w/adj. φ's
OptiM
G4beamline
KE[MeV]
w/OptiM's φ's
LEMC2009 workshop 8-12 Jun 2009
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
MAG, Jun 14, 2010
z[cm]
Muons, Inc.
Every 3rd solenoid (adjusted from oncrest)
800
ET [MeV]
0
t[nS]
Muons, Inc.
22nS
LEMC2009 workshop 8-12 Jun 2009
Operated by JSA for the U.S. Department of Energy
Sep 14, 2010
Muons, Inc.
GPT
y[m]
G4beamline
LEMC2009 workshop 8-12 Jun 2009
z[m z[m
Sep 14, 2010
]
Muons, Inc.
]
Operated by JSA for the U.S. Department of Energy
Muons, Inc.
lost
LEMC2009 workshop 8-12 Jun 2009
Sep 14, 2010
Operated by JSA for the U.S. Department of Energy
Muons, Inc.
those that made it
to the end in
G4beamline
input t,Pz
for
acceptance
OptiM
generated
input
LEMC2009 workshop 8-12 Jun 2009
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
Sep 14, 2010
Muons, Inc.
Synchrotron motion
Pz
~ oncrest
~ 1 synch period
t
LEMC2009 workshop 8-12 Jun 2009
Sep 14, 2010
Operated by JSA for the U.S. Department of Energy
t
Muons, Inc.
∘RF
~ oncrest
~ 1 synch period
#m
LEMC2009 workshop 8-12 Jun 2009
Muons, Inc.
Operated by JSA for the U.S. Department of Energy
Sep 14, 2010
z[m]
Muons, Inc.
LEMC2009 workshop 8-12 Jun 2009
Muons, Inc.
Operated by JSA for the U.S. Department of Energy