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