the phenix experiment role of the particle identification
TRANSCRIPT
•T
he P
HE
NIX
exp
erim
ent
•R
ole
of th
e Pa
rtic
le Id
entif
icat
ion
at h
igh
Pt•
Aer
ogel
Cer
enko
vde
tect
or•
Des
ign
•T
est-
beam
per
form
ance
•O
utlo
oks
Ext
ende
d Pi
d in
PH
EN
IX(B
NL
,Dub
na, T
okyo
, Tsu
kuba
)
E.K
iste
nev
for t
he P
HEN
IX H
igh
Pt U
pgra
de P
roje
ct
CIP
AN
P 20
03
trac
king
:D
C,P
C1,
PC
2, P
C3
elec
tron
Id:
RIC
H,
EM
Cal
, TE
Cph
oton
s:E
MC
alch
arge
d ha
dron
Id:
Aer
ogel
, RIC
H, T
EC
, EM
Cal
PHE
NIX
at R
HIC
Exte
ndin
g PH
ENIX
Rea
chEx
tend
ing
PHEN
IX R
each
Ext
endi
ng P
id to
10
GeV
/c w
ill e
nhan
ce–
Jet t
aggi
ng –
initi
al v
s fin
al st
ate
part
onic
evo
lutio
n;–
Cha
rm &
bea
uty
mea
sure
men
t in
Au+
Au
colli
sion
s ->
ener
gy lo
ss o
f cha
rm/b
eaut
y in
hot
mat
ter;
−∆G
mea
sure
men
t by
heav
y qu
ark
prod
uctio
n in
wid
e x
rang
e;–
Glu
on sh
adow
ing
in w
ide
x ra
ngePr
esen
t pT
rang
e w
ith P
ID :
π/K
up
to 2
GeV
/c
p/(π
+K) u
p to
4.5
GeV
PHE
NIX
Hig
h Pt
Upg
rade
Pro
ject
01
23
45
67
89
1002468101214161820
pion
(n=1
.015
)
pion
(n=1
.010
)
pion
(CO
2,n=
1.00
041)
kaon
(n=1
.015
)
kaon
(n=1
.010
)
prot
on(n
=
1.01
5)
prot
on
(n=1
.010
)
Mom
entu
m(G
eV/c
)
N p.e.A
erog
elde
tect
or b
uild
ing
bloc
ks
Goa
l: K
-thr
esho
ld c
lose
to 5
GeV
/c
Che
renk
ov e
mis
sion
in A
erog
el
•It
is C
here
nkov
Em
issi
on.
+
−=
2
22
2m
ax1
1p
pm
nN
N
Lig
ht y
ield
vsM
omen
tum
L
ight
Yie
ld v
s Ref
ract
ive
inde
x
Nph
oton
visi
ble
≈50
0sin
2ϑ
c [1
/cm
]
ϑc
=C
os−1
(1 n β
)
Nm
ax=
500
×q.e
.×12
[cm
]≈
1200
p.e
.D
ata
from
Bel
le, s
lide
from
Ya.
Mia
ke
PHE
NIX
Aer
ogel
n=
1.01
2
Aer
ogel
Det
ecto
r R&
D –
Test
Bea
m a
t KE
K
Ligh
t Yel
d D
epen
denc
e on
Aer
ogel
Sta
ck T
hick
ness
•Li
ght Y
ield
satu
rate
s at ~
12
cm d
epth
•Sc
atte
ring
dom
inat
es in
ligh
t los
ses
3 G
eV/c
pio
ns
n =
1.01
7
R62
33(3
”,no
n-U
V)
L
Λsc
att∝
λ4 , Λ
abs∝
λ2
Uni
form
ity o
f the
Lig
ht Y
Ield
N=1
.014
Ligh
t yie
ld a
nd c
ount
er o
rien
tatio
n
Aer
ogel
Bea
m
dire
ctio
n
Tim
ing
in a
erog
el d
etec
tor
-bet
ter t
hen
the
coun
ter s
ize
track
mat
chin
g
-bac
kgro
und
reje
ctio
n
Subn
anos
econ
d re
solu
tion
mea
sure
d w
hen
timin
g on
firs
t ph
otoe
lect
on
PHE
NIX
PID
in R
un4
and
beyo
nd …
5 -9
1 -5
n=1.
01γt
h~8.
5A
erog
el
17 -
5 -1
7n=
1.00
044
γth~
34R
ICH
-50
-2.5
σ~
100
psTO
F
Kao
n-Pr
oton
sepa
ratio
nPi
on-K
aon
sepa
ratio
n
04
8
04
8
04
80
48
04
8
04
8