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AMS R ing I maging CH erenkov. J. BERDUGO CIEMAT, Madrid (Spain). PURPOSE: Precise measurement of the velocity of charged particles Measurement of the charge of the particles. Cherenkov radiation. Velocity. Charge Velocity. Particle. Cerenkov Radiator. Conical Reflector. - PowerPoint PPT Presentation
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AMS-RICH Detector. J. Berdugo – CIEMAT (Madrid, Spain) 1 AMS-02 Phase II Flight Safety Review
AMS Ring Imaging CHerenkov
PURPOSE:
1. Precise measurement of the velocity of charged particles
2. Measurement of the charge of the particles
Velocity
Electric Charge
CerenkovRadiator
Photo- detectors
ConicalReflector
ChargeVelocityParticl
e
Cherenkov radiation
J. BERDUGOCIEMAT, Madrid (Spain)
AMS-RICH Detector. J. Berdugo – CIEMAT (Madrid, Spain) 2 AMS-02 Phase II Flight Safety Review
Collision products: p, D, He4, Li6,…
AMS RICH Performances: Test at CERN Accelerator
Ek/n=158 GeV/n
H
C
O
Fe
Charge measurement:Identification of different nuclei
Charge (Z)
Velocity measurement: Accuracy of one part in a 1000
Velocicty (v/c)
(v)/v = 0.09%
AMS-RICH Detector. J. Berdugo – CIEMAT (Madrid, Spain) 3 AMS-02 Phase II Flight Safety Review
AMS RICH Main Elements
► Dual solid radiator configurationLow refractive index aerogelSodium fluoride
► Conical reflectorReflectivity > 85%
► Photon detection planePhotomultiplier matrix (10880 channels)Spatial granularity: 8.5 x 8.5 mm2
47 cm
64x64 cm2
114 cm
134 cm
AMS-RICH Detector. J. Berdugo – CIEMAT (Madrid, Spain) 4 AMS-02 Phase II Flight Safety Review
NaF
Aerogel
Configuration for the Acceptance Vibration Test
AMS RICH RadiatorAerogel NaF
Number of tiles 80 16
Thickness (mm) 25 5
Size (mm2) 113 x 113 85 x 85
Refractive index 1.05 1.33
Clarity (m4/cm) 0.0055
Max Opening Angle (deg) 17.8 41.5
Threshold velocity (v/c ) 0.952 0.752
Venting Valve Halkey Roberts
C770RP
50 m filter (stainless steel)
Interface blocks (Peek)
AMS-RICH Detector. J. Berdugo – CIEMAT (Madrid, Spain) 5 AMS-02 Phase II Flight Safety Review
AMS RICH Radiator: Container Assembly and Test
Assembly of the Radiator Container under the Lower TOF Structure
Vibration Test Lower TOF and RICH Radiator Container
AMS-RICH Detector. J. Berdugo – CIEMAT (Madrid, Spain) 6 AMS-02 Phase II Flight Safety Review
AMS RICH Reflector
MANDRELThe reflector is made by a replica
technique
Flight Unit
AMS-RICH Detector. J. Berdugo – CIEMAT (Madrid, Spain) 7 AMS-02 Phase II Flight Safety Review
AMS RICH Detection Plane
HAMAMATSU 7600-00-M16
• 4 X 4 pixels• Each pixel is 4 x 4 mm2
Array of 680 photomultiplier tubes
10880 sensors
• Gain ~ 106 @ 800 V• QE 20 % in the range 250-600 nm
FRONT-END ELECTRONICS
Acquisition circuit (16 channels)
Resistor Divider for HV
Mounted on 4 small PCB located at the basement
of the phototubeHV Isolation• Polycarbonate
housing• Dow Corning
injection
AMS-RICH Detector. J. Berdugo – CIEMAT (Madrid, Spain) 8 AMS-02 Phase II Flight Safety Review
-35°
55°
The PMT´s will stand a wide range of Temperatures (-35O to 55O)
AMS RICH Detection Plane: Thermal Test of Photomultipliers
AMS-RICH Detector. J. Berdugo – CIEMAT (Madrid, Spain) 9 AMS-02 Phase II Flight Safety Review
AMS RICH Detection Plane: Unit cell Mechanical Assembly
FE ElectronicsPhotomultiplier
Optical Pad
Housing
Shielding
Light GuideNylon wires
AMS-RICH Detector. J. Berdugo – CIEMAT (Madrid, Spain) 10 AMS-02 Phase II Flight Safety Review
Two unit cells were tested to reach the breakage point
AMS RICH Detection Plane: Unit cell Mechanical Test
The wires accomplished 38 gNo breakage occurredNo degradation on the optical contact
AMS-RICH Detector. J. Berdugo – CIEMAT (Madrid, Spain) 11 AMS-02 Phase II Flight Safety Review
AMS RICH Detection Plane: Unit cells arranged in GRIDS
Total
Grids 4+4
Unit Cells 680
Read-out lines 92
Read-out boards 12
HV lines 160
Thermal sensors 96
Internal beams
Stiffness skin
U-Beam Read-out boards
HV Patch panel
Unit Cells
AMS-RICH Detector. J. Berdugo – CIEMAT (Madrid, Spain) 12 AMS-02 Phase II Flight Safety Review
Internal beams
Unit Cells
Assembly Jigs
AMS RICH Detection Plane: Grid Assembly
AMS-RICH Detector. J. Berdugo – CIEMAT (Madrid, Spain) 13 AMS-02 Phase II Flight Safety Review
HV connectionRead-out
kapton cables
Stiffness skin
HV Patch panelRead-out boards
AMS RICH Detection Plane: Grid Internal Cabling
AMS-RICH Detector. J. Berdugo – CIEMAT (Madrid, Spain) 14 AMS-02 Phase II Flight Safety Review
AMS RICH Detection Plane: Vibration and TVT
Vibration Test Rectangular Grid (143 units)
Thermal Vacuum Test Rectangular Grid (143 units)
AMS-RICH Detector. J. Berdugo – CIEMAT (Madrid, Spain) 15 AMS-02 Phase II Flight Safety Review
Online/SlowCtrl Software Validation:
• Read-out Communication Protocol • HV Power Supply Control• Software for Calibration and Data taking• Temperature Sensors Read-out
Characterization Data:
HV OFF: Pedestals and electronic
noise
HV ON: Dark Current Gains Efficiencies
HV Power Supply
Optical Fiber System
JIN-R
AMS RICH Detection Plane: Functional Test
AMS-RICH Detector. J. Berdugo – CIEMAT (Madrid, Spain) 16 AMS-02 Phase II Flight Safety Review
RDR2JINR RDR3
• Generation of control signals to drive the front-end electronics
• Monitoring and setting of parameters
• Processing of the signal
• Online calibration
12 electronic boards located on the edge of the detector structure
AMS RICH Electronics: Read-out System
Produced at CRISA
21 Units (4 QM +12 FM + 5 FS)
Board# Units
(QM)# Units(FM+FS)
RDR2 (2 CDPs) 1 4+2
RDR3 (3 CDPs) 1 2+1
RDR3L (3 CDPs) 1 2+1
JINR (1 CDP + 1 CDDC) 1 4+1
AMS-RICH Detector. J. Berdugo – CIEMAT (Madrid, Spain) 17 AMS-02 Phase II Flight Safety Review
AMS RICH Final Assembly: Grids in the Main Structure
AMS-RICH Detector. J. Berdugo – CIEMAT (Madrid, Spain) 18 AMS-02 Phase II Flight Safety Review
The RICH detector has been validated by testing all the critical elements under different external conditions
Two test beam data campaigns have demonstrated that the required capabilities of the detector are reached
The detector is close to final completion and on schedule for integration at CERN
SUMMARY