Director’s Review July 25-27, 2006 T. Shaw1 DES Review DES Front End Electronics WBS 1.3 T. Shaw.
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Transcript of Director’s Review July 25-27, 2006 T. Shaw1 DES Review DES Front End Electronics WBS 1.3 T. Shaw.
Director’s Review July 25-27, 2006 T. Shaw 1
DES Review
DES Front End Electronics
WBS 1.3
T. Shaw
Director’s Review July 25-27, 2006 T. Shaw 2
DES FE Project Definition
We must read out a large focal plane of CCDs
62 Science CCDs
8 Alignment CCDs
4 Guide CCDs
The Science and Alignment CCDs are read out at the same rate with the same clocking patterns
250k-pixels/s @ 10e- rms noise
The Guide CCDs will be readout at a faster rate; will not interfere with required “quiet” time of Science and Alignment CCDs
Director’s Review July 25-27, 2006 T. Shaw 3
DES FE Electronics WBS structure
Director’s Review July 25-27, 2006 T. Shaw 4
LBL CCD
Vsub Vsub
HI_U HI_L
H2_U H2_L
H3_U H3_L
Vr_U Vr_L
RG_U RG_L
Video_U Video_L
Vdd_U Vdd_L
Vopg_U Vopg_L
SW_U SW_L
TG TG
p+ guard p+ guard
FS1 FS1
FS2 FS2
FS3 FS3
V1 V1
V2 V2
V3 V3
n+ guard n+ guard
Vsub Vsub
CCD Bond Pads2048 x 409615 µm pixelCCD
Vertical clockingmoves chargetowards serialregister
Horizontal clockingmoves charge along serial outputregister to videooutput amplifiers
Director’s Review July 25-27, 2006 T. Shaw 5
Signal Count per CCD
Each CCD will require control of the following signals:Horizontal clocking
H1_U, H1_L, H2_U, H2_L, H3_U, H3_L, SW, RGVertical clocking
V1, V2, V3, TGErase control
n+ guardBias voltages
Vr_U, Vr_L, Vdd, Vopg, Vsub
Totals: 13 clocks per CCD5 bias levels per CCD
“Tuning” of optimal CCD readout is accomplished by adjusting clock rail voltages and bias settings. We are assuming, relying on current test results, that production readout can group at least 3 CCDs together with like clock rail settings.
Director’s Review July 25-27, 2006 T. Shaw 6
CCD Packaging – Picture FrameWBS 1.3.1
CCD is wire bonded to a polymide board
Director’s Review July 25-27, 2006 T. Shaw 7
CCD Packaging – Pedestal PackageWBS 1.3.2
CCD is wire bonded to an AlN board
37-pin Nanonics Dualobe connector
Director’s Review July 25-27, 2006 T. Shaw 8
Monsoon Readout SystemWBS 1.3.6
Monsoon– Developed by NOAO
– Crate based system (Eurocard format)
– cPCI backplane used (no cPCI protocol)
– Open Design• Schematics available• Firmware available• Layout files available
– Boards exist• Master Control Board• Clock and Bias Board• 8 Channel Acquisition Board
– Large software framework exists
http://www.noao.edu/ets/monsoon/
Director’s Review July 25-27, 2006 T. Shaw 9
Monsoon Block Diagram
Director’s Review July 25-27, 2006 T. Shaw 10
Monsoon Crate
MCBCBB8-ChCCDAcq.
Director’s Review July 25-27, 2006 T. Shaw 11
History of Monsoon at FNAL
Mid 2004DES group looks into the Leach and Monsoon Systems as possible readout solutions. Leach is
an established proprietary readout system for CCDs. Monsoon offered some advantages – higher density (8 channel card vs 2 channel card of Leach); telemetry readout (readback of clock rail voltages and bias voltages); designed for large mosaics; open architecture; easy to customize. (Lots of manpower already expended by NOAO on Monsoon ~12 engineering years/~5 programmer years/~5 board layout years.)
University of Illinois Urbana-Champaign began to purchase the initial Monsoon test stands.March 2005
FE workshop at FNAL; decision to continue to pursue Monsoon as readout platform.April 2005
Receive MCB, CBB and a blank prototype 8 ch CCD Acq Board to be hand assembled.Never able to achieve low noise.
Nov 2005Delivery of 2 complete Monsoon systems (MCB, CBB and production 8 ch CCD Acq Board).Fairly quickly began running with <10e- noise at ~12us/pixel.
Jan 2006FNAL takes delivery of Leach System. Leach performance quickly matches Monsoon
performance.Feb 2006
FEE Panel formed to examine choice of design platform. Specifically, to look at Leach and Monsoon.
Director’s Review July 25-27, 2006 T. Shaw 12
History of Monsoon at FNAL
Feb 2006Delivery of two additional complete Monsoon Systems. One was shipped to
Barcelona
Mar 2006With “short” cable run, we are able to achieve ~6.5e- noise at ~6us/pixel
April 2006 With a pre-amp (WBS 1.3.5) located outside of dewar wall, we are able to achieve
~6.5e- noise at ~6us/pixel with a long cable
June 2006FEE Panel tasked with examining choice of Monsoon vs Leach comes back with its
findings.In summary
Monsoon work seems to be progressingKeep an eye on 12 Channel Board design; fallback to use current 8 Channel BoardLeach Controller remains a viable alternative in case of unforeseen problem with
Monsoon.
July 2006Delivery of fourth Monsoon system for FNAL
Director’s Review July 25-27, 2006 T. Shaw 13
Pre-amp Board (WBS 1.3.5) currently outside of dewar
Director’s Review July 25-27, 2006 T. Shaw 14
Proposed Changes to Monsoon
• To use the Monsoon System for DES, we will customize the boards for our specific application:– Build a 12 channel CCD Acq Module which would provide
customized bias voltages, RTD readout, and Vsubstrate ramp control. (WBS 1.3.8)
– Build a customized Clock Board to better address our clocking needs; greater fanout ability to drive more clocks. (WBS 1.3.7)
– Slight modification to the Master Control Board to allow for switch to S-Link as the fiber optic link. (WBS 1.3.9)
Breakout session will cover these new board designs in more detail.
Director’s Review July 25-27, 2006 T. Shaw 15
PF Packaging WBS 1.3.10
UIUC has worked with FNAL mechanical engineers and proposes to instrument the telescope using three FE crates.
These crates would each contain two backplanes; one with 6 slots and one with 4 slots.
A single 4-slot section would provide for readout of up to 9 guide CCDs
The remaining backplane sections would provide readout of up to 72 science and alignment CCDs.
UIUC is also providing engineering support for crate power supplies.
MCB
CLOCK
CCD
Acq
CLOCK
CCD
Acq
CCD
Acq
MCB
CLOCK
CCD
Acq
CCD
Acq
Provides Readout of up to
18 CCDs
Provides Readout of up to
9 CCDs
Director’s Review July 25-27, 2006 T. Shaw 16
Vacuum Interface Board(VIB) WBS 1.3.4
Vacuum Interface Board will provide the connection between the Monsoon boards and the CCDs on the focal plane.
Monsoon cables will plug into the VIB outside the vacuum.
Kapton cables will be used to connect between Vacuum Interface Board and the CCDs inside the dewar.
Director’s Review July 25-27, 2006 T. Shaw 17
Vacuum Interface BoardWBS 1.3.4
Kapton CableWBS 1.3.3
AlN BoardWBS 1.3.2
Camera Vessel Instrumentation
Director’s Review July 25-27, 2006 T. Shaw 18
DES FE Electronics L3 Milestones
DES FE Electronics L3 MilestonesL3 - CCD readout review - go ahead for V2 4/1/2007L3 - Testing of Internal Pre-amp Board and Kapton Cable Complete 5/31/2007L3 - Testing of v2 DES Clock and Transistion Card Complete 2/18/2008L3 - Testing of DES Master Control Board Complete 3/27/2008L3 - Production Electronics Review Complete 3/27/2008L3 - Testing of Vacuum Interface Boards For Camera Complete 9/12/2008L3 - Testing of Production DES Clock and Transition Card Complete 11/29/2008L3 - DES Front End Electronic Production Complete 6/25/2009
19
Monsoon Electronics Schedule & Milestones
20
DES Electronics Schedule & Milestones
Director’s Review July 25-27, 2006 T. Shaw 21
Engineering Teams/Responsibilities
FNAL(T. Shaw, D. Huffman, M. Kozlovsky, Jamieson Olsen, Walter Stuermer)
Instrumentation of CCD testing stations12 Channel CCD Acq Module & TransitionVacuum Interface Board CablingPre-amps
UIUC(T. Moore, V. Simaitis)
CratePower Supply
Barcelona(Laia Cardiel, Miquel Barceló)
Clock & Bias Board Fanout Transition ModuleClock Board TransitionMaster Control Board
Madrid(Gustavo Martinez, Javier Castilla, Juan De Vicente)
Clock Board
Groups in Spain will design and produce Clock Board and Master Control Board.FNAL will prototype 12 Channel CCD Acquisition Board; Spain will produce the board.
Director’s Review July 25-27, 2006 T. Shaw 22
FE Electronics Costs
COST FNAL Labor M&S TotalM&S Contingency
In-Kind Contributions
1.3 Front End Electronics $2,065,070 $1,492,354 $710,356 $137,640 $729,3001.3.1 Picture frame readout $16,584 $1,584 $15,000 $0 $01.3.2 Pedestal ALN boards $383,676 $231,960 $193,556 $41,840 $01.3.3 Kapton cables, internal $205,288 $117,288 $103,400 $15,400 $01.3.4 Vacuum Interface Board (VIB) and connectors $259,360 $172,360 $107,400 $20,400 $01.3.5 Pre-amp Signal FE boards $190,976 $108,976 $113,200 $31,200 $01.3.6 Monsoon for CCD testing $25,000 $0 $25,000 $0 $147,0001.3.7 DES Clock and Transition Modules (Madrid/Barcelona) $89,968 $89,968 $0 $0 $201,0001.3.8 Monsoon 12 channel Acquisition & Transition Boards $732,458 $638,458 $110,800 $16,800 $262,8001.3.9 Master Control Board (Barcelona) $0 $0 $0 $0 $103,500
1.3.10 FEE crates for PF Cage $30,000 $0 $42,000 $12,000 $15,0001.3.11 Integration and testing of electronics on camera $131,760 $131,760 $0 $0 $01.3.12 Front End Electronics Milestones (Section 1.3) $0 $0 $0 $0 $0
Director’s Review July 25-27, 2006 T. Shaw 23
Conclusions
FE Readout is based upon the Monsoon system. This is working for the readout of our small test dewars. New customized Monsoon modules are being designed to address specific DES requirements.
Leach remains as a fallback to the Monsoon readout solution.
Next plans:
Readout an array of CCDs in the large test dewar.
Optimize cable design; location of pre-amp.
Director’s Review July 25-27, 2006 T. Shaw 24
Backup slide
Director’s Review July 25-27, 2006 T. Shaw 25
Monsoon Quantity/Cost estimates