Beam Linac Surface lines amp building DBMB 500 GeV Bypass for the DB Power for the DB B Jeanneret CTC 24th August 2010 With material thanks to G McMonagle ID: 232341
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Slide1
Drive Beam Linac, Surface lines & building DB+MB,500 GeV Bypass for the DB,Power for the DB
B. Jeanneret,
CTC, 24th August 2010
With
material
thanks
to
G.
McMonagle
,
E.Jensen
, R.
Wegner
, A.
Aksoy
, D.
Siemaszko
& D.
Nisbet
,
J. Osborne, N.
Baddams
L.
Rinolfi
,
D.SchulteSlide2
DB Linacs2Slide3
DB Linac parameters3Slide4
Cell structureR. Wegner, E. Jensen, A, Aksoy, D. SchulteRF active section : 20
cells
× 0.1m = 2m
Coupler,
interconnect
: 0.5 m
Quad, MBCO, BPM : 0.6 m
TOTAL : 3.1 m
May need adjustement ( Vacuum equip. for pressure p ~ 5 10-11 Torr, … )
3100
Linac
1
15 MW klystrons
Acc
. V/module 3.2 MV
819
cells
/
linac
Total
length
2540 mPlug-power for RF (2 linacs):290 MW( 0.115 MW/m)
4Slide5
Magnets – quadrupolesN=819 Q, spaced by 3.1m for each Linac (total Linac length 2540m)
R = 3.7 10
-2
Ω
, I
max
= I
0 = 414 A, pmax = 6.3 kWGradient must follow the beam energy
increase
I(n) = nI0/N
Power scheme similar to DECEL_Q advisable
Total power : P = N
pmax/3 = 4 MW5
1 (s=0)
N=819 (s=2540m)
I(n)
I
0
= 414 ASlide6
Power & CoolingTotal plug power for RF : Ptot = 290 MW 140 MW to beam
150 MW to
heat
Total power for
magnets
(Quad + Sol):
9 MW to
heat
Total installed power :Pinstalled = (1+
ε) × ( 290 + 9 ) with
ε the 18kV conversion yield (see with Daniel/
Cesary)Add for light, cranes, safety systems, …Total cooling
power (tunnel & surf. Blg
) :Pcool = (1+ ε) × ( 150 + 9 )
6Slide7
DB Linac, tunnelTotal length now : 2540 m
conflict
with
EHN1
move towards top of the drawing, see
below
6000
1000
800
3000
1000
1200
Water
cooling
pipes,
Cable
trays
Loads
7Slide8
8
0.75m
3m
5m
3m
2m
3.1m
2m
2.5m
4m
1.5m
3.5m ?
11.75m
3m
DB
Linac
building
Top
view
(
half
)
End
view
(
half
)
Width
: 23.5m
Height
: 9m ?
Length
: 2540 m
Klystrons are
transported
along
the central
path
.
A
technical
area
without
RF
must
be
foreseen
at
crane
extremities
Slide9
Top View of DB LinacA small building is needed for 18kV station ~ every yy = 40 m ?
Size : xx by xx , xx = ?
Installed
power
4.6 MW/40m
23500
~
yy
xx
xx
Awaiting
data
From
RF and EL
9
Still
to
be
worked-out
with CesarySlide10
Top view of DB Linac buildings10
23 m
30 m
420 m
2140 m
Underground & surface (
slide
6 & 7)
Underground,
Same
section as in
slide
6
(CDR, to
be
revised
for TDR)
Fixed
point
(
before
delay
loops
)Slide11
Surface layout11Slide12
Site implementation12DB Linac (undergroud and surface)
- Long segment : 2140 m
- Short segment : 420 m
Width
now
23m
But
annex blgs
for 18kV missing
Use 30m as average Slide13
500 GeV delayed transfer for the drive beamB.Jeanneret , July 201013Slide14
Input dataTime delay between e+ & e- DB train :The two sets of 5 trains each 240 ns are produced one after the
other
with
a single
Linac
Δ
t = 5 × 24 × 240 ns = 28800 ns
Δ = 8640 mThe trains must be synchronous when
passing along the end of the Main Linac
14Slide15
15Slide16
Case 1 : e+ trains come first and go through : AFGHI-TA-IHGFBCDe- trains go through : AFGHICase 2 :e- trains come first and go through : ABCD-TA-DCBFGHIe+ trains go through : ABCD
C
H
G
A
B
F
TA
From
CR2
Case 1
r
x
D
C
H
G
A
B
F
From
CR2
Case 2
TA
r
x
Blue :
additional
beam
line
Red
:
additional
tunnel
D,I : end of ML
AG = 770
GH = 1449
HI = CD = 25 (500GeV)
AC = 2117
AB = 2r = 524
TA = 146
With
y = AG+GH+AC+2*HI
x = (
Δ
+ 2r – y –TA)/2
x(
case1
) = x(
case2
) = 2316 m
See
~/clic/CDR/500gev/bypath.sce
D
I
I
Option I :
Coming
back to surface
16Slide17
Option II : Use a by-path around IP-- Preferred case --
D,I : end of ML (500
GeV
)
e
+
in D &
e
- in I : synchronousΔdb = 8640ID = 2×1870 , TA = 146
δbp = 14
x = (Δdb - δbp
- ID –TA)/2 = 2361 mx / Lsector = 2361/877 = 2.70
sectors
D
C
A
From
CR2
TA
x
I
IP
see
:/Users/Bernard/clic/CDR/500gev/bypath_ugnd.sce
17Slide18
Impact for hardware / underground by-pathx / Lsector = 2361/877 = 2.7 sectorsone extra DB line to
be
housed
in the main tunnel
Civ
. Eng. :
374 m of tunnel to
be added for by-path1
additionnal turn-around
, of type ‘DB’Additional beam lines
: 3740 m ( DI ) of type ‘DB-LTL’1 dedicated turn-around
, of type ‘DB’Beam
lines not needed :Surface loop
& descent down (2460 m)Advantage : disconnected from surface changes for Main
Beam
18
Alexey,MicheleSlide19
Experimental area and by-path19Slide20
Power for the DB20Slide21
21
All power data in MWSlide22
Summary for drive beam powerEnd-Linac Enter Decelerator22
[MW]
To
beam
To
heat
Total
Linac
RF
287
140147
Solenoids5
Quad.
4296Formation
6161
Chicanes & dumps13
13Fast kick & amp
00
Total
230370