Ghostbuster gif

C M S
R P C M U O N T R IG G E R
sta tu s r e p o r t
T
1 .
S
2 .
3 .
4 .
P A C
E S T S O F
T R A T E G Y
I
L H C
-L IK E
M P A C T
J. K R Ó L IK O W S K I
,
O N
F O R
T E S T
T H E
V .2 P R O T O T Y P E
2 0 0 1 IN
B E A M
V IE W
IN
O
O F T H E
R P C
N O IS E
P R O B L E M
C T O B E R
S C H E D U L E
M
U O N
T
R IG G E R
M
E E T IN G ,
C M S W
E E K ,
M
A R C H . 2 0 0 1
C M S
E
X T E N S IV E
F
>
O U R
T
>
T
W
O
T E S T S W
E R R O R S IN
O F T H E M
T
A
H E R E
- T H E
O
-
A R E
N E
IN P U T
9 -T H
T W
T
O F T H E
J. K R Ó L IK O W S K I
,
P A C
W
9
T H E
E
T A G
W
E R E
F O U N D .
P A C
A S IC S F O
S T A G E S O F
U S E
T H E
.
R
T E S T S
IT H
S E R IO U S E R R O R S :
P T ) IS N O T
O P E R A T IO N A L
R E G IS T E R S , U S E D
L U T
S O L V E S T H E
L O G IC
IN P U T
W
C A U T IO N ).
(L O W
J
D E S IG N
C O U L D
M O R E
M A S K S A N D
L O A D IN G
H E
O
B L O C K
IN T E R F E R E N C E
>
IN
S O M E
R E
P E R F O R M E D .
A S IC
T H E
H IS M E A N S T H A T
(E X E R C IS IN G
>
E R E
F O R
S G IV E S R A N D O M
T H E
C L O C K .
S
W
P E R F O R M
M
U O N
Y E T
P R O G R A M M IN G
R E S U L T S .
IT C H IN G
P R O B L E M .
S E E M S T O
- N O T
O K
.
T
R IG G E R
T
M
O F T H E
E E T IN G ,
U N D E R S T O O D ,
O F
H IS IS D U E
C L O C K
C M S W
T O
T H E
D U R IN G
E E K ,
M
A R C H . 2 0 0 1
C M S
S
C
T R A T E G Y
O N C L U S IO N S O F T H E
F O R
2 0 0 1 IN
R P C
N O IS E
W
V IE W
O F T H E
R P C
O R K S H O P A N D
N O IS E
P R O B L E M
S U B S E Q U E N T
S C
R P C n o is e m a y b e le s s o f a p ro b le m th a n d e c la re d in S e p t. 2 0 0 0 .
T h e re a re , h o w e v e r, to o m a n y u n c e rta in tie s to b e c o n fid e n t.
S trin g e n t Q u a lity C o n tro l c rite ria a re n e e d e d fo r th e R P C s .
P re s e n tly th e y a re n o t w e ll d e fin e d . T h e w a y to a p p ro a c h th e m is to u s e
p re -p ro d u c tio n o f R P C , w h ic h w ill g iv e 2 0 fu ll s c a le c h a m b e rs b y J u n e :
Q C C rite ria fo r th e o n g o in g te s t p ro d u c tio n o f 2 0 fu ll s c a le R P C s :
a v e ra g e n o is e < 1 0 H z /c m 2 , n o is e a t th e w o rs t s trip < 1 5 H z /c m 2 .
c rite ria a re to b e w ritte n u p b y G . Ia s e lli, s till n o t a v a ila b le .
O n e c h a m b e r fro m th is p re -p ro d u c tio n w ill b e c a re fu lly m e a s u re d ,
th e n o ile d a n d m e a s u re d a g a in .
E x te n s iv e s im u la tio n o f th e trig g e r p e rfo rm a n c e w ith e x tra R P C p la n e s
s h o w s th a t o n e c a n n o t d ra s tic a lly im p ro v e trig g e r p e rfo rm a n c e .
S o m e im p ro v e m e n t is o f c o u rs e p o s s ib le , a n d w e a re w o rk in g o n th a t.
Ø
§
§
Ø
Ø
J. K R Ó L IK O W S K I
,
M
U O N
T
R IG G E R
M
E E T IN G ,
C M S W
E E K ,
M
A R C H . 2 0 0 1
trigger rate at 25 GeV (Hz)
Trigger rate vs RPC noise
10
8
10
7
10
6
3/4
10
5
4/6
10
4
10
3
10
towers 0-9
5/7
on
ti
uc
2
ed
r
e
7th plane
is
10
C
RP
no
points - detailed simulation
1
10
-1
lines - analytical calculation
-2
hatched areas - safety margins
10
-3
10
5
10
50
100
500
1000
2
RPC noise (Hz/cm )
M o r e p la n e s ? M o r e c o m p lic a te d P A C
a lg o r ith m ?
C M S
M o re R P C p la n e s in th e b a rre l s e e m
to b e ru le d o u t. T h e re m ig h t b e o n e e x tra
p la n e in th e e n d c a p s .
T h e lo w p T b a rre l p la n e s m a y b e
Ø
u s e d in th e h ig h p T a lg o rith m , re s u ltin g
in m o re c o m p lic a te d P A C d e s ig n .
S e v e ra l o p tio n s a re b e in g s tu d ie d in
W a rsa w .
P A C A S I C w ill b e c o n v e r te d to 0 .2 5
Ø
ìm , w ith p o s s ib ility o f im p le m e n tin g
m o r e in v o lv e d a lg o r ith m ( e .g . w ith m o r e
R P C p la n e s ).
P o s itiv e o u tc o m e o f th e R P C n o is e
Ø
w o r k s h o p : s ta tio n 1 R P C s in th e b a rre l
w ill b e p la c e d a t lo w e r ra d ii in c re a s in g
g e o m e tric a l a c c e p ta n c e .
Ø
J. K R Ó L IK O W S K I
,
M
U O N
T
R IG G E R
M
E E T IN G ,
C M S W
E E K ,
M
A R C H . 2 0 0 1
New proposed RPC geometry
R (cm)
800
Drift Tubes
RPC new RPC
700
600
500
moved
RPC
400
300
200
100
CSC
0
0
200
400
600
800
1000
1200
Z (cm)
Barrel — inner RB1 moved ~30cm inwards. Trigger uses 4/6 coincidences.
Endcap — new RPC plane at RE2. Trigger uses 4/5 coincidences.
L H C
C M S
Ø
Ø
o
o
o
o
o
Ø
-L IK E
2 5 n s L H C -lik e
F irs t te s t o f th e
6 R P C s a n d F E
L in k B o a rd s ,
S p litte rs ,
T rig g e r B o a rd ,
R e a d o u t B o a rd
C o m m o n e ffo rt
J. K R Ó L IK O W S K I
,
T E S T
B E A M
O
IN
C T O B E R
b e a m a v a ila b le in 2 C p e r io d in G I F ( 2 4 .1 0 - 4 .1 1 )
c o m p le te p ro to ty p e R P C trig g e r c h a in :
B ,
o f g ro u p s fro m
B a ri, H e ls in k i, K o re a , a n d W a rs a w .
M
U O N
T
R IG G E R
M
E E T IN G ,
C M S W
E E K ,
M
A R C H . 2 0 0 1
C M S
IM P A C T o n th e M IL E S T O N E S a n d
S C H E D U L E
W
ith r e s p e c t to th e s c h e d u le d is c u s s e d in th e T D R th e
R P C tr ig g e r p r o je c t h a s a c c u m u la te d d e la y o f 2
m o n th s , d e p e n d in g o n th e ta s k s .
T h e d e la y is ,
a n d r e d e s ig n
1 . P A C tr ig
th e R P C n o is
R P C -p r e -p r o
2 . S p litte r s
3 . T B – d e p
J. K R Ó L IK O W S K I
,
a t le a s t p a r tia lly , d u e to th e o p tim
o f :
g e r p r o c e s s o r (s till in th e flu id s ta
e d is c u s s io n ; e x p e c te d to fir m u p
d u c tio n r e s u lts in J u n e 2 0 0 1 ),
– s p e c ific a tio n fin a liz e d 2 w e e k s a
e n d s o n P A C a n d S p litte r s .
M
U O N
T
R IG G E R
-5
iz a tio n
te a fte r
a fte r
M
g o ,
E E T IN G ,
C M S W
E E K ,
M
A R C H . 2 0 0 1
Recently completed Warsaw CMS notes
CMS IN-2001/007
Sorting Tree and Ghostbuster for RPC Muon Trigger
CMS IN-2001/004
Alternative Implementation of Pattern Comparator Trigger based on SRAM
CMS IN-2001/003
Study on Additional RPC Planes for the Muon Trigger
CMS IN-2001/002
PAttern Comparator (PAC) ASIC version 2 Specification
CMS NOTE-2000/067
Isolated Muon Trigger
CMS IN-2000/054
Simulated Geometry of the RPC System in CMSIM 118-120 and ORCA 4.2
CMS IN-2000/043
Layout of the Link System for the RPC Pattern Comparator Trigger