rbx prr - march 1-2, 20011 h c a l hcal rbx prr readout box (rbx) prr dan green hcal project manager
Post on 20-Dec-2015
219 views
TRANSCRIPT
RBX PRR - March 1-2, 2001 1
H
C
A
L
HCAL RBX PRRHCAL RBX PRRHCAL RBX PRRHCAL RBX PRR
Readout Box (RBX)
PRR
Dan Green
HCAL Project Manager
RBX PRR - March 1-2, 2001 2
H
C
A
L
OutlineOutlineOutlineOutline
• Schedule and Milestones
• R&D experience
• RBX components• shell
• backplanes
• ODU
• HPD
• Calib - laser, LED, sources
• Services - HV, LV, cooling,
• Controls
RBX PRR - March 1-2, 2001 3
H
C
A
L
HCAL OrganizationHCAL OrganizationHCAL OrganizationHCAL Organization
RBX PRR - March 1-2, 2001 4
H
C
A
L
HCAL - ML, HBHCAL - ML, HBHCAL - ML, HBHCAL - ML, HB
RBX PRR - March 1-2, 2001 5
H
C
A
L
HCAL Critical Path and RBXHCAL Critical Path and RBXHCAL Critical Path and RBXHCAL Critical Path and RBX
RBX PRR - March 1-2, 2001 6
H
C
A
L
Central HCALCentral HCALCentral HCALCentral HCAL
HE
HB 15
16RBX
RBX
RBX PRR - March 1-2, 2001 7
H
C
A
L
HB RBX Detail ViewHB RBX Detail ViewHB RBX Detail ViewHB RBX Detail View
The issue for the RBX is the access to the HPD. There are integration issues with the tracker patch panel. A mockup was made and changes appear possible which will ease the problem. Schedule is such that the RBX is near to the critical path.
RBX PRR - March 1-2, 2001 8
H
C
A
L
HE RBX Conceptual DesignHE RBX Conceptual DesignHE RBX Conceptual DesignHE RBX Conceptual Design
HE can go ahead with the RBX, it appears, as the overlap of services and cables with other subsystems is not as severe as it is with HB.
RBX PRR - March 1-2, 2001 9
H
C
A
L
ODU - Optics for Layer-->TowerODU - Optics for Layer-->TowerODU - Optics for Layer-->TowerODU - Optics for Layer-->Tower
RBX PRR - March 1-2, 2001 10
H
C
A
L
HPDHPDHPDHPD
19 x 5.5mm 73 x 2.75mm
The HPD have had many problems which have been solved - sequentially. At present we specify an Al electrode and an anti-reflection coating. This “works” but the problem of low yields at the vendor must be solved.
RBX PRR - March 1-2, 2001 11
H
C
A
L
H1 and H2 LayersH1 and H2 LayersH1 and H2 LayersH1 and H2 Layers
RBX PRR - March 1-2, 2001 12
H
C
A
L
Pulse Formation - BiasPulse Formation - BiasPulse Formation - BiasPulse Formation - Bias
300 micron R9814032
-3
-2
-1
0
1
2
3
4
5
6
7
20 30 40 50 60 70 80 90 100
time[ns]
pu
lse
he
igh
t[m
V]
Vb=180
Vb=150
Vb=100
200 micron S9849328
-3
-2
-1
0
1
2
3
4
5
6
7
0 10 20 30 40 50 60 70 80
time[ns]p
uls
e h
eig
ht[
mV
]
Vb=200
Vb=150
Vb=120
Vb=100
Vb=75
Vb=50
We have developed at fast diode which - with guard rings - can be run at very high bias.
RBX PRR - March 1-2, 2001 13
H
C
A
L
Near Term HPD R&DNear Term HPD R&DNear Term HPD R&DNear Term HPD R&D
RBX PRR - March 1-2, 2001 14
H
C
A
L
HCAL QIE-based Front EndHCAL QIE-based Front EndHCAL QIE-based Front EndHCAL QIE-based Front End
ChannelControl
ASIC
Exponent(1:0)
CapID(1:0)
Mantissa(4:0)
800 Mbit/sSerializer
VCSEL
CMS QIE
Exponent(1:0)
CapID(1:0)
Mantissa(4:0)
Clock
Reset
Pedestal(3:0)
Test Pulse
Test Pulse
Clock
Reset
Pedestal(3:0)
Data(15:0)
Clock
Control
Serial Control Bus
Global Reset
Bunch Crossing Zero
40 MHz ClockSPLITTER
INTEGRATOR
ENCODER
FADC
CMS QIE
CMS QIE Solution
T. Shaw5/18/00
RBX PRR - March 1-2, 2001 15
H
C
A
L
QIE ScheduleQIE ScheduleQIE ScheduleQIE Schedule
RBX PRR - March 1-2, 2001 16
H
C
A
L
Decoder Box, Test Beam R&DDecoder Box, Test Beam R&DDecoder Box, Test Beam R&DDecoder Box, Test Beam R&D
RBX PRR - March 1-2, 2001 17
H
C
A
L
Access to FE ElectronicsAccess to FE ElectronicsAccess to FE ElectronicsAccess to FE Electronics
End of HB wedges obscured by cables and services from HB, EB, tracker. Servicing electronics nontrivial.
53 degree end of HB wedge.
Blue = HCAL services
Green = ECAL
Red = Tracker
RBX PRR - March 1-2, 2001 18
H
C
A
L
GoalsGoalsGoalsGoals
• We have a ~ final design which has been on hold for 6 months.
• The schedule for RBX is near to the critical path.
• The design has been sent to CMS for evaluation and optimization.
• We need approval of the RBX - optical cables, ODU, shell, etc. The HPD and QIE are not yet ready for prime time.