Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR...
-
Upload
douglas-oneal -
Category
Documents
-
view
216 -
download
0
description
Transcript of Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR...
![Page 1: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/1.jpg)
Proposal for LST-basedIFR barrel upgrade
Roberto Calabrese
Ferrara University
Workshop on IFR replacement, SLAC, 11/14/2002
![Page 2: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/2.jpg)
Outline General Overview Layout geometry Performance Readout methodology Electronics Gas, HV, DAQ Costs Other presentations
![Page 3: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/3.jpg)
General overview The entire project is driven by the allowed space
The intrinsic efficiency of a standard LST tube is about 90%.
This is due to dead spaces in the LST tubes.
Efficiency is too low for our purposes. Not enough space to put 2 standard layers.
![Page 4: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/4.jpg)
Possibilities to improve efficiency(given the allowed space) Option 1: single-layer with a large cell (19x17 mm)
Readout of x and y coordinates from outside strips
![Page 5: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/5.jpg)
Possibilities to improve efficiency Option 2: double-layer with a small cell (9x8mm)
Readout of x coordinate from wire and y coordinate from outside strips
![Page 6: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/6.jpg)
Possibilities to improve efficiency Option 3: modified double-layer with a small cell (9x8mm)
Readout of x and y coordinates from outside strips
![Page 7: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/7.jpg)
Detector layout: segmentation of a detector layer
Z strip readout
Layer of LST
Ф strip readout
Z strip signal collection PCB
Z strip signal collection PCB
Ф strip signal collection PCB(a similar one in the opposite corner)
PCB for cable connectors
PCB for cable connectors
Servizio Elettronico INFN Ferrara
![Page 8: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/8.jpg)
Detector layout: details of strip signal collection PCB
Servizio Meccanico INFN Ferrara
![Page 9: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/9.jpg)
Performance Expected efficiency about 96% Position resolution better than 3 mm (z)
for standard LST better than 9 mm ()
We do not need such a resolution and we can increase the strip width, thus decreasing the number of channels ( MC simulation)
![Page 10: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/10.jpg)
Detector layout: questions How many strips?
resolution, cost, space
How many chambers/layer ?installation, cost
![Page 11: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/11.jpg)
Detector layout: answer to the questions We are considering 4 cm z-strips and 4.3 cm -strips
(2 -strips (along the wire)/LST tube) 96 z-strips for each layer, total 6912 z-strips 74 -strips for the outer layer, total 4572 -strips
About 11500 channels of electronics
2 chambers/layer (remove only one corner block at the time), but the number of z-strips doubles (more cables, but same number of electronics channels) or we need to decouple z-strips from the chambers
![Page 12: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/12.jpg)
Readout methodology Only digital readout of strips
Time measurements could be implemented: OR of 16 discriminated pulses Time resolution about 16 ns ( using BaBar reference clock) Implemented with FPGA
![Page 13: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/13.jpg)
Electronics FEC gain depends on the shape of the signal
FEC ampli cannot be used
Existing FEC: to be modified if we want to use them (when?) the baseline is to use new electronics
![Page 14: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/14.jpg)
Front end module design : block diagram of the NEW 96 channel (1 view of 1 layer) FEC
96x Amplifier-Discriminator
11us
Dig
ital O
neSh
ot
Shift/LoadCk_Chain Data Out
SHIFT REGISTER
96 x
Threshold
12us
Dig
ital O
neSh
ot
11us
Dig
ital O
neSh
ot
12us
Dig
ital O
neSh
otShift/Load To the Active Patch Panel
ahead of the FIFO Board
6 x6 x
6 x
Implemented in a single high performance FPGA (Field Programmable Gate Array)
Cost per channel inclusive of:
-components
-PCB
-crate&power supply
10 € / channel
Servizio Elettronico INFN Ferrara
![Page 15: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/15.jpg)
Front end module design : schematic of the front end based on Off-The-Shelf components
Power dissipation: 250mW
Servizio Elettronico INFN Ferrara
![Page 16: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/16.jpg)
Front end module design : analog simulations, effect of strip capacitance and impedance
Simulation of the amplifier/discriminatoroutput from a 4pC input signal(0.1mA * 40ns)Comparator threshold = 50mV
dielectric thickness 0.75mma) dielectric FOAM (εr=1)
b) dielectric PTE (εr=3.3)
c) dielectric FR4 (εr=4.8)
a) b)
c)
Servizio Elettronico INFN Ferrara
![Page 17: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/17.jpg)
Gas system mass flow control system main gas transport pipe system (existing) final gas distribution and bubbling system.
We assume all the tubes in a layer with a single in/out Safe gas mixture, like Ar/Iso/CO2 (2.5/9.5/88) (SLD)
![Page 18: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/18.jpg)
HV, DAQ
Each tube has a separate HV connection ( 2 for a double layer tube) Possibility to use a commercial HV system for LST available
from CAEN (SY546 mainframe + 12 channel boards A548),150 $/channel
DAQ No change, all signals are FEC-like
![Page 19: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/19.jpg)
Costs: assumptions
double layer LST with 8mm cells; each layer with a separate HV; each ground returning separately through a measuring resistor 96 strips (40 mm strips) in the z direction; 2 strips per LST in the direction 2 chambers/layer (double the number of z strips signals) 12 active layers
![Page 20: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/20.jpg)
Costs (I) Tubes:
30 K$ (setup) 450 K$ ( about 200 $/tube x 2280 double layer tubes)Total cost tubes 480K$
(using single layer tube this cost would be about 300K$) Strip readout planes
240 m2/layer x 6 layers x 50 $/m2 = 72 K$Signal collection (PCB’s) inside iron 18 K$Total cost readout planes 90 K$
Grand total chambers 570K$ (double layers); 390K$ (single layers)
![Page 21: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/21.jpg)
Total cost of signal flat cables 146 K$ (outside iron) 15 K$ (inside iron)
Total cost of signal flat cable connectors 28 K$ Total cost of electronics 115 K$ Service panels 4 K$ Total cost of LV ground wire 5 K$ Total cost of LV plugs 4K$ TDC system 20K$ (optional)
Total electronics + cables 322 K$ (maximum); 171 K$ (minimum)
Costs (II)
![Page 22: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/22.jpg)
Costs (III) Total cost of HV wire 23 K$ Total cost of HV banana plugs 9 K$ Total cost of HV power supply+distributors 170 K$ Total cost of mass flow control system 11 K$ Total cost bubbling system 4 K$ DAQ, cooling no expected cost
Total this page 217 K$
Grand total detector 780 K$ 1100 K$
![Page 23: Proposal for LST-based IFR barrel upgrade Roberto Calabrese Ferrara University Workshop on IFR replacement, SLAC, 11/14/2002.](https://reader035.fdocuments.net/reader035/viewer/2022062523/5a4d1b027f8b9ab059986f28/html5/thumbnails/23.jpg)
Addressing the various issues R&D issues and status Changguo Lu
LST experience andproduction issues Mario Posocco
Installation issues Livio Piemontese