gde expectations from the srf community...the scrf technology recommendation 11 • the...
TRANSCRIPT
GDE expecta
tions fro
m the
SRF community
Barr
y B
ari
sh
Corn
ell
SR
F M
tg15-J
uly
-05
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
2
The E
nerg
y Fro
ntier
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
3
Why e
+e
-Collisions?
•elementa
ry particles
•well-defined
–energ
y,
–angular momentu
m
•uses full C
OM energ
y
•pro
duces particles
democra
tically
•can m
ostly fully
reconstruct events
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
4
A R
ich H
isto
ry as a P
owerful Pro
be
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
5
Why a T
eV S
cale?
•T
wo
pa
rall
el
de
ve
lop
me
nts
ov
er
the
pa
st
few
ye
ars
(the scie
nce
the scie
nce
the scie
nce
the scie
nce
& t
he
te
ch
no
log
y)
–T
he p
recis
ion
in
form
ati
on
e+e
-an
d ν ννν
data
at
pre
sen
t en
erg
ies h
ave p
oin
ted
to
a l
ow
mass H
igg
s;
U
nd
ers
tan
din
g e
lectr
ow
eak s
ym
metr
y b
reakin
g,
wh
eth
er
su
pers
ym
metr
y o
r an
alt
ern
ati
ve, w
ill re
qu
ire
pre
cis
ion
measu
rem
en
ts.
–T
here
are
str
on
g a
rgu
men
ts f
or
the c
om
ple
men
tari
ty
betw
een
a ~
0.5
-1.0
TeV
IL
C a
nd
th
e L
HC
scie
nce.
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
6
Electroweak
Pre
cision M
easure
ments
e+e
+ a
nd
ne
utr
ino
sc
att
eri
ng
re
su
lts
at
pre
se
nt
en
erg
ies
str
on
gly
po
int
to a
low
ma
ss
Hig
gs
an
d
an
en
erg
y s
ca
le f
or
ne
w p
hys
ics
< 1
Te
V
0246
100
20
400
mH
[GeV
]
Exclu
ded
Pre
limin
ary
∆α
had =
∆α
(5)
0.0
27
61±
0.0
00
36
0.0
27
47±
0.0
00
12
With
ou
t N
uT
eV
the
ory
un
ce
rta
inty
Win
ter
2003
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
7
Why a T
eV S
cale e
+e
-Accelera
tor?
•T
wo
pa
rall
el
de
ve
lop
me
nts
ov
er
the
pa
st
few
ye
ars
(the scie
nce
the scie
nce
the scie
nce
the scie
nce
& t
he
te
ch
no
log
y)
–T
he p
recis
ion
in
form
ati
on
fro
m L
EP
an
d o
ther
data
h
ave p
oin
ted
to
a lo
w m
ass H
igg
s;
Un
ders
tan
din
g
ele
ctr
ow
eak s
ym
me
try b
rea
kin
g, w
heth
er
su
pers
ym
metr
y o
r a
n a
ltern
ati
ve, w
ill re
qu
ire
pre
cis
ion
measu
rem
en
ts.
–T
here
are
str
on
g a
rgu
men
ts f
or
the c
om
ple
men
tari
ty
betw
een
a ~
0.5
-1.0
TeV
LC
an
d t
he L
HC
scie
nce.
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
8
Lin
ea
r C
oll
ide
r S
pin
Me
as
ure
me
nt
LH
C s
ho
uld
dis
co
ver
the
Hig
gs
Th
e lin
ear
co
llid
er
sh
ou
ld
measu
re i
ts s
pin
LHC/ILC C
omplementa
rity
Th
e p
rocess e
+e
–→ →→→
HZ
can
b
e u
sed
to
measu
re t
he
sp
in o
f a 1
20 G
eV
Hig
gs
part
icle
.
Th
e H
igg
s m
ust
be s
pin
zero
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
9
Higgs C
oupling and E
xtra D
imensions
•IL
C p
recis
ely
measu
res H
igg
s
inte
racti
on
str
en
gth
wit
h s
tan
dard
m
od
el
part
icle
s.
•S
traig
ht
blu
e lin
e g
ives t
he
sta
nd
ard
mo
del
pre
dic
tio
ns.
•R
an
ge o
f p
red
icti
on
s in
mo
dels
wit
h e
xtr
a d
imen
sio
ns -
-yell
ow
ban
d,
(at
mo
st
30
% b
elo
w t
he
Sta
nd
ard
Mo
del
•T
he m
od
els
pre
dic
t th
at
the e
ffect
on
each
part
icle
wo
uld
be e
xactl
y
the s
am
e s
ize.
•T
he r
ed
err
or
bars
in
dic
ate
th
e
level
of
pre
cis
ion
att
ain
ab
le a
t th
e
ILC
fo
r each
part
icle
•S
uff
icie
nt
to d
isco
ve
r extr
a
dim
en
sio
nal p
hysic
s.
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
10
Ex
tra
Dim
en
sio
ns
Lin
ear
co
llid
er
LHC/ILC
Complementa
rity
Map
extr
a d
imen
sio
ns:
stu
dy
the e
mis
sio
n o
f g
ravit
on
s in
to
the e
xtr
a d
imen
sio
ns, to
geth
er
wit
h a
ph
oto
n o
r je
ts e
mit
ted
in
to t
he n
orm
al
dim
en
sio
ns.
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
11
The S
CRF T
echnology R
ecom
mendation
•T
he r
eco
mm
en
dati
on
o
f IT
RP
was p
resen
ted
to
IL
CS
C &
IC
FA
on
A
ug
ust
19,
2004 i
n a
jo
int
meeti
ng
in
Beijin
g.
•IC
FA
un
an
imo
usly
en
do
rsed
th
e I
TR
P’s
reco
mm
en
dati
on
on
A
ug
ust
20,
2004
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
12
The C
ommunity then S
elf-O
rganized
Nov 1
3-1
5,
2004
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
13
The First IL
C M
eeting at KEK
There
were
220 partic
ipants
divided a
mong
6 w
ork
ing gro
ups
Work
ing G
roup 1: Overa
ll D
esign
Work
ing G
roup 2: Main Linac
Work
ing G
roup 3: In
jecto
r, including damping rings
Work
ing G
roup 4: Beam D
elivery
Syste
ms,
including collim
ato
r, final fo
cus, etc
.
Work
ing G
roup 5: Cavity design: higher gra
dients
, ..
Work
ing G
roup 6: Strate
gic communication
Each w
ork
ing gro
up had thre
e convenors
, one fro
m
each regio
n
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
14
Snowmass –
GDE T
akes O
ver
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
15
mai
n lin
acbu
nch
com
pres
sor
dam
pin
grin
g
sour
ce
pre-
acce
lera
tor
collim
atio
n
final
focu
s IP
extr
actio
n&
dum
p
KeV
few
GeV
few
GeV
few
GeV
250-
500
GeV
Sta
rting P
oint fo
r th
e G
DE
Superc
onducting R
F M
ain
Lin
ac
Superc
onducting R
F M
ain
Lin
ac
Superc
onducting R
F M
ain
Lin
ac
Superc
onducting R
F M
ain
Lin
ac
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
16
Para
mete
rs for th
e ILC
•E
cm
ad
jus
tab
le f
rom
20
0 –
50
0 G
eV
•L
um
ino
sit
y � ���∫Ldt
= 5
00
fb
-1in
4 y
ea
rs
•A
bil
ity t
o s
ca
n b
etw
ee
n 2
00
an
d 5
00
Ge
V
•E
ne
rgy s
tab
ilit
y a
nd
pre
cis
ion
be
low
0.1
%
•E
lec
tro
n p
ola
riza
tio
n o
f a
t le
as
t 8
0%
•T
he
ma
ch
ine
mu
st
be
up
gra
de
ab
le t
o 1
Te
V
The G
lobal Design E
ffort
Fo
rmal
org
an
izati
on
beg
un
at
LC
WS
05 a
t S
tan
ford
in M
arc
h 2
005 w
hen
I b
ecam
e d
irecto
r o
f th
e G
DE
Te
ch
nic
all
y D
riv
en
Sc
he
du
le
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
18
GDE –
Near Term
Plan
•S
ch
ed
ule
•B
eg
in t
o d
efi
ne C
on
fig
ura
tio
n (
Au
g 0
5)
•B
aseli
ne C
on
fig
ura
tio
n D
ocu
men
t b
y e
nd
of
2005
----
----
----
----
----
----
----
----
----
----
----
----
----
----
----
----
----
---
•P
ut
Baseli
ne u
nd
er
Co
nfi
gu
rati
on
Co
ntr
ol (J
an
06)
•D
evelo
p R
efe
ren
ce D
esig
n R
ep
ort
by e
nd
of
2006
•T
hre
e v
olu
me
s -
-1
) R
efe
ren
ce
De
sig
n R
ep
ort
;
2)
Sh
ort
er
glo
ss
y v
ers
ion
fo
r n
on
-ex
pe
rts
an
d
po
lic
y m
ak
ers
; 3
) D
ete
cto
r C
on
ce
pt
Re
po
rt
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
19
GDE –
Near Term
Plan
•O
rga
niz
e t
he
IL
C e
ffo
rt g
lob
all
y–
Fir
st
Ste
p -
--A
pp
oin
t R
eg
ion
al D
irecto
rs w
ith
inth
e
GD
E w
ho
will serv
e a
s s
ing
le p
oin
ts o
f co
nta
ct
for
each
reg
ion
to
co
ord
inate
th
e p
rog
ram
in
th
at
reg
ion
. (
Gerr
y D
ug
an
(N
ort
h A
meri
ca),
Fu
mih
iko
Taka
sa
ki
(Asia
), B
rian
Fo
ste
r (E
uro
pe))
–M
ake W
eb
sit
e, co
ord
inate
meeti
ng
s, co
ord
inate
R
&D
pro
gra
ms,
etc
•R
&D
Pro
gra
m–
Co
ord
inate
wo
rld
wid
e R
& D
eff
ort
s, in
ord
er
to
dem
on
str
ate
an
d im
pro
ve t
he p
erf
orm
an
ce,
red
uce
the c
osts
, att
ain
th
e r
eq
uir
ed
reliab
ilit
y,
etc
.
(Pro
po
sal D
riven
to
GD
E)
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
20
GDE –
Near Term
Plan
•S
taff
th
e G
DE
–A
dm
inis
trati
ve,
Co
mm
un
icati
on
s, W
eb
sta
ff
–R
eg
ion
al D
irecto
rs (
on
e p
er
reg
ion
)
–E
ng
ineeri
ng
/Co
sti
ng
En
gin
eer
(on
e p
er
reg
ion
)
–C
ivil E
ng
ineer
(on
e p
er
reg
ion
)
–K
ey E
xp
ert
s f
or
the G
DE
desig
n s
taff
fro
m t
he w
orl
d
co
mm
un
ity
–F
ill in
mis
sin
g s
kills
(l
ate
r)
To
tal
sta
ff s
ize
ab
ou
t 2
0 F
TE
(2
00
5-2
00
6)
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
21
Design Issues
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
22
Toward
s the ILC B
aseline D
esign
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
23
Cost Bre
akdown by S
ubsyste
m
cf
31
%
str
uctu
res
18
%rf
12
%
syste
ms_
en
g
8%
insta
llatio
n&
test
7%m
ag
ne
ts
6%
va
cu
um
4%c
on
tro
ls
4%
cry
o
4%
op
era
tio
ns
4%
instr
um
en
tatio
n
2%
Civil
Civil
Civil
Civil
SCRF Lin
ac
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
24
What Gra
dient to
Choose?
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
25
TESLA C
avity
9-c
ell
1.3
GH
z N
iob
ium
Cavit
y
Refe
ren
ce
desig
n:
has n
ot
been
mo
dif
ied
in
10 y
ears
~1m
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
26
(Impr
ove surfac
e qu
ality --
pion
eering
work don
e at KEK)
BC
PE
P
•S
evera
l sin
gle
cell c
avit
ies a
t g
> 4
0 M
V/m
•4 n
ine-c
ell c
avit
ies a
t ~
35 M
V/m
, o
ne a
t 40 M
V/m
•T
heo
reti
cal
Lim
it 5
0 M
V/m
Electro-polishing
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
27
Gra
dient
Results from
KEK-DESY
collaboration
must reduce
spread (need
more statistics)
single-cell measurements (in nine-cell cavities)
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
28
How C
osts
Scale w
ith G
radient?
Relative Cost
Gra
die
nt
MV
/m
2 0
$li
nc
ry
o
aG
bG
Q≈
+
35M
V/m
is
clo
se t
o
op
tim
um
Jap
an
ese
are
sti
ll
pu
sh
ing
fo
r 40-
45M
V/m
30 M
V/m
w
ou
ld g
ive
safe
ty
marg
in
C. A
do
lph
sen
(SL
AC
)
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
29
Gra
die
nt
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
30
Evolve the C
avities
Minor Enhancement
Lo
w L
oss D
esig
n
Mo
dif
icati
on
to
cavit
y s
hap
e
red
uce
s p
eak B
fie
ld. (A
sm
all
Hp
/Eacc
rati
o a
rou
nd
35O
e/(
MV
/m)
mu
st
be
desig
ned
).
Th
is g
en
era
lly m
ean
s a
sm
all
er
bo
re r
ad
ius
Tra
de-o
ffs (
Ele
ctr
op
olish
ing
, w
eak c
ell-t
o-c
ell c
ou
plin
g,
etc
)K
EK
cu
rren
tly p
rod
ucin
g p
roto
typ
es
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
31
New C
avity D
esign
Mo
re r
ad
ical
co
ncep
ts p
ote
nti
ally
off
er
gre
ate
r b
en
efi
ts.
Bu
t re
qu
ire t
ime a
nd
m
ajo
r n
ew
in
frastr
uctu
re t
o d
evelo
p.
2×8 cell Super-structure
Re-entrant
single-cell achieved
45.7 MV/m
Q0~1010
(Cornell)
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
32
Experimenta
l
Sta
tus
single cell
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
33
Accelera
tor Physics C
hallenges
•D
evelo
p H
igh
Gra
die
nt
Su
perc
on
du
cti
ng
RF
syste
ms
–R
eq
uir
es e
ffic
ien
t R
F s
yste
ms, cap
ab
le o
f accele
rati
ng
hig
h
po
wer
beam
s (
~M
W)
wit
h s
mall b
eam
sp
ots
(~n
m).
•A
ch
ievin
g n
m s
cale
beam
sp
ots
–
Req
uir
es g
en
era
tin
g h
igh
in
ten
sit
y b
eam
s o
f ele
ctr
on
s a
nd
p
osit
ron
s–
Dam
pin
g t
he b
eam
s t
o u
ltra
-lo
w e
mit
tan
ce in
dam
pin
g r
ing
s–
Tra
nsp
ort
ing
th
e b
eam
s t
o t
he c
ollis
ion
po
int
wit
ho
ut
sig
nif
ican
t em
itta
nce g
row
th o
r u
nco
ntr
olled
beam
jit
ter
–C
lean
ly d
um
pin
g t
he u
sed
beam
s.
•R
each
ing
Lu
min
osit
y R
eq
uir
em
en
ts
–D
esig
ns s
ati
sfy
th
e lu
min
osit
y g
oals
in
sim
ula
tio
ns
–A
nu
mb
er
of
ch
allen
gin
g p
rob
lem
s in
accele
rato
r p
hysic
s a
nd
te
ch
no
log
y m
ust
be s
olv
ed
, h
ow
ever.
15-J
uly
-05
Co
rne
ll S
RF
Work
sh
op
-B
arish
34
•T
he M
ach
ine
•A
ccele
rato
r b
aselin
e c
on
fig
ura
tio
n w
ill b
e d
ete
rmin
ed
an
d
do
cu
men
ted
(B
CD
) b
y t
he e
nd
of
2005
•R
&D
pro
gra
m a
nd
pri
ori
ties d
ete
rmin
ed
(p
rop
osal d
riven
)
•B
aselin
e c
on
fig
ura
tio
n w
ill b
e t
he b
asis
of
a r
efe
ren
ce d
esig
n
do
ne in
2006
•T
he D
ete
cto
r(s)
•D
ete
rmin
e f
eatu
res, sco
pe:
on
e o
r tw
o, etc
(sam
e t
ime s
cale
)
•M
easu
re p
erf
orm
an
ce o
f th
e b
aselin
e d
esig
n
•B
eam
delive
ry s
yste
m a
nd
mach
ine d
ete
cto
r in
terf
aces
•D
efi
ne a
nd
mo
tivate
th
e f
utu
re d
ete
cto
r R
&D
pro
gra
m
The G
DE P
lan