D. Rodríguez Piñeiro, D. Khaneft, M. C. Mora Espí, Y. Ma, F. Maas, M. Zambrana, I. Zimmermann
1
D. Rodríguez Piñeiro, D. Khaneft, M. C. Mora Espí, Y. Ma, F. Maas, M. Zambrana, I. Zimmermann GeV / % 2 % 1 E Crystals are hosted in carbon fibre alveoles due to its good strength and low material budget. The BW end cap of the PANDA EMC comprises 540 crystals (24.4x24.4x200 mm 3 ) covering theta angles between 147º and 161º from target position. Due to the high weight the detector will be held from the outside, using a counterweight and placing the alignment system. Accurate rails will be used for insertion into the magnet. Counterweight Main support Alignment system Aluminium inserts glued to the alveoles and screwed to a mounting plate Micro Vertex Detector Target System Central Tracker GEM Detectors Mini Drift Chambers Shashlyk Calorimeter Muon Range System Dipol e Disc DIRC Muon Detection EM Calorimeter Barrel DIRC Beampipe Barre l TOF Solenoid TOF Wall PANDA Experiment RICH Avalanche Photodiode (APD) has been chosen as the photon detector for EMC, which still is functional under strong magnetic field. The APD used in PANDA EMC features a large area to maximize the coverage of the PWO end face. ASIC chip will be used as the electronics after APD, which is still under development. The picture above is the preamplifier designed for prototype EMC. The preamplifier features a low noise and low heat generation. Acknowledgement: P. Rosier Contact Persons: D. Rodríguez Piñeiro, Dr. Y. Ma, I. Zimmermann Backward end cap electromagnetic calorimeter PANDA at FAIR facility Scintillation material: PbWO 4 Dimension: 25×25×200mm 3 (Varies) Number of crystals: ca. 15,000 Angular coverage: 99% of 4 π Operation temperature: -25 o C Energy threshold: 10 MeV Expected radiation dose: 10 Gy/125 Gy forward Energy resolution: L-Frames fixing the position of the capsule with the APD. In order to see the influence of the ambient temperature, the heating caused by the preamplifiers and other heating sources first thermal simulations have been started. Here a Unit of 4 crystals is shown. It also includes the capsules for the APD´s and one insert. A heat flux through the vacuum panels is assumed and also the heating caused by the preamplifiers is included. Because of the additional cooling, a fixed temperature of -25°C is assumed in the back. More sophisticated simulation is under going. 2 mm Carbon fibre Low thermal expansion Rohacell spacers Good strength High Vacuum Conduction stop Super insulation foils Radiation stop - 25ºC 20º C 2 mm Aluminium Good thermal conductivity PbWO 4 Crystals Design Parameters of PANDA EMC Thermal Studies Mechanical Support Subunit BW end cap inside the PANDA experiment
description
PANDA Experiment. GEM Detectors. Shashlyk Calorimeter. Muon Range System. Mini Drift Chambers. Central Tracker. Target System. Micro Vertex Detector. Solenoid. Barrel TOF. TOF Wall. Dipole. Beampipe. RICH. Muon Detection. Disc DIRC. EM Calorimeter. Barrel DIRC. Main support. - PowerPoint PPT Presentation
Transcript of D. Rodríguez Piñeiro, D. Khaneft, M. C. Mora Espí, Y. Ma, F. Maas, M. Zambrana, I. Zimmermann
D. Rodríguez Piñeiro, D. Khaneft, M. C. Mora Espí, Y. Ma, F. Maas, M. Zambrana, I. Zimmermann
GeV/
%2%1
E
Crystals are hosted in carbon fibre alveoles due to its good strength and low material budget.
The BW end cap of the PANDA EMC comprises 540 crystals (24.4x24.4x200 mm3) covering theta angles between 147º and 161º from target position.
Due to the high weight the detector will be held from the outside, using a counterweight and placing the alignment system.
Accurate rails will be used for insertion into the magnet.
Counterweight
Main support
Alignment system
Aluminium inserts glued to the alveoles and screwed to a mounting plate
Micro Vertex Detector
Target System
Central Tracker
GEM Detectors
Mini Drift Chambers
Shashlyk CalorimeterMuon Range System
Dipole
Disc DIRCMuon Detection
EM Calorimeter
Barrel DIRC
Beampipe
Barrel TOF
Solenoid
TOF Wall
PANDA Experiment
RICH
Avalanche Photodiode (APD) has been chosen as the photon detector for EMC, which still is functional under strong magnetic field. The APD used in PANDA EMC features a large area to maximize the coverage of the PWO end face.
ASIC chip will be used as the electronics after APD, which is still under development. The picture above is the preamplifier designed for prototype EMC. The preamplifier features a low noise and low heat generation.
Acknowledgement:
P. Rosier
Contact Persons: D. Rodríguez Piñeiro, Dr. Y. Ma, I. Zimmermann
Backward end cap electromagnetic calorimeter PANDA at FAIR facility
Scintillation material: PbWO4
Dimension: 25×25×200mm3 (Varies)Number of crystals: ca. 15,000Angular coverage: 99% of 4 π Operation temperature: -25 oCEnergy threshold: 10 MeVExpected radiation dose: 10 Gy/125 Gy forward
Energy resolution:
L-Frames fixing the position of the capsule with the APD.
In order to see the influence of the ambient temperature, the heating caused by the preamplifiers and other heating sources first thermal simulations have been started. Here a Unit of 4 crystals is shown. It also includes the capsules for the APD´s and one insert. A heat flux through the vacuum panels is assumed and also the heating caused by the preamplifiers is included. Because of the additional cooling, a fixed temperature of -25°C is assumed in the back. More sophisticated simulation is under going.
2 mm Carbon fibre Low thermal expansion
Rohacell spacers Good strength
High Vacuum Conduction stop
Super insulation foils Radiation stop
-25ºC 20ºC
2 mm Aluminium Good thermal conductivity
PbWO4 Crystals
Design Parameters of PANDA EMC
Thermal Studies
Mechanical Support
Subunit
BW end cap inside the PANDA experiment
