Highlights of space sensor developments in Spain 1st SPACERAD meeting Brussels, 12 November 2002

Highlights of space sensor developments

in Spain

1st SPACERAD meeting

Brussels, 12 November 2002

1st SPACERAD meeting in Brussels, 12 November 2002

AMS Project at CIEMAT

Highlights of space sensor developments in Spain

The Astroparticle Physics Project at CIEMAT takes over the activities that few members of the HEP group started in 1997 through the participation in the precursor flight for the AMS Experiment

Since year 2000, CIEMAT is participating in the Construction of the AMS-02 Detector

The detector will have capabilities to identify the cosmic ray nuclei with Z 20 and to measure their energy spectrum up to the TeV region.

The International Space Station (ISS) is a unique platform for accurate measurements of cosmic rays (low background, infrastructure capabilities)

The purpose of the AMS Experiment is to perform accurate and high precision primary cosmic ray measurements in the space.

A particle detector will be placed for a 3-year period on the International Space Station (ISS).

AMS on the ISS• Orbit altitude 400 km• Power 2 kW• Weight ~ 7 T• Exposure time > 3

years




AMS02 Detector

Geometrical Acceptance = 0.45 m2 sr

Weight ~ 7 T Power 2 kW

1.5 %(p) / p

8PlanesTracker

0.78 Tm2BL2Magnet

AMS-02Sub-Detector

0.1 % () / RICH

< 10-6 e/p TRD & EMC




CIEMAT ACTIVITIES

•Software development and Analysis

•Participation in the AMS02 Construction

– Superconducting Magnet Electronics

– Cerenkov Counter Detector (RICH)




IAC

SPACE FLIGHT ENGINEERINGSPANISH COMPANIES

• HEP Group• Electronics and Automation Laboratory• Superconductivity Group (CEDEX)

Infrastructure Mechanical Workshops and Electronics Lab. Characterisation of materials (optics, aging,…) Assembly room

SPACE FLIGHT ELECTRONICSSPANISH COMPANIES

CRISA

NTE,sa




RICH Requirements

Independent measurement of the velocity ( ) of charged particles

() / 10-3 @ = 1 (protons)

Mass Measurement (resolution 1%)

Measurement of charge for ions with Z < 20

e+/p separation up to energies 10 GeV

Measurement of light isotope abundance (H/H2/H3, He3/He4, Be10/Be9)

Cerenkov Radiation Detector

AMS RICH Collaboration: CIEMAT (Madrid), INFN (Bologna), ISN (Grenoble), LIP (Lisbon), UNAM (Mexico)




Radiator 3 cm of Aerogel (n 1.05) Np.e. 20 (for Z=1; =1) thershold 0.953

Reflector Reduce photon losses Multilayer Structure

deposited on a Carbon Fiber Reinforced Composite (CFRC) Substrate

Photon Detection~ 700 photomultipliers (Hamamatsu

7600-00-M16) 4 x 4 mm2 effective

area/pixel Gain ~ 106 @ 800 V Quantum Efficiency 20 %

in the range 250-600 nm B Field 50 % Effective area

Shielding Light guides

AMS RICH Description•Size: 50 cm height

160 cm diameter

•Weight < 200 Kg•Power ~ 80 Watt




AMS RICH

PMT Assembly Unit

RICH Prototype

Assembly Clean Room (CIEMAT)

Read-Out design and prototyping (CIEMAT)

HV Power supply prototype (NTE-CAEN)

AMS Magnet Electronics

Laboratory Breadboard of Cryomagnet Current Source (CRISA)

Lab BB Current Source Modules

Main Parameters of the AMS-02 Magnet System

Central magnetic field 0.87 T Dipole bending power 0.78 Tm2 Nominal operating current 459 A Nominal magnet inductance 48.9 H Stored energy 5.15 MJ Peak magnetic field on Helmholtz coils 6.6 T Peak magnetic field on racetrack coils 5.9 T Maximum stray field at R=3 m 3.9 mT Magnetic torque .27 Nm Superconducting material NbTi Work temperature (Superfluid Helium) 1.8K

MIT

CRISA




Department of Fusion and Particle Physics

Electronics and Automation Laboratory

• Electronics within R&D projects

• R&D line on radiation detectors

Activities:

1. The development of equipment and technologies

based on conventional detectors

2. Applied research on novel detectors, particularly

on room temperature semiconductor detectors.

CIEMAT




• (2000-2002) (2000-2002) CZT statusCZT status:: planar devices planar devices revealed intrinsic limitations. New designs for revealed intrinsic limitations. New designs for large volume high resolution spectrometers.large volume high resolution spectrometers.

1. From Frish grids: coplanar devices

2. Pixel detectors: 3D sensing

Radiation Detection Room Temp. Semiconductor Detectors

• (1990-1998) CdTe/HgI2 HgI2

• (1998-2000) CZT

• Thick HgI2 detectors. Signal treatment and analysis• Imaging. Gamma camera for industrial application• Experiment in Minisat-I

• Digital studies on thin (1-2 mm) CZT detectors.

Signal processing (wavelets).








1. Coplanar devices• Spectrometric Characterization• Electrode design• Electrical studies• Monte Carlo simulation

2. Pixel detectors• Electrical studies


0

400

800

1200

1600

0 100 200 300 400 500 600 700 800Energy (keV)

· J.M. Pérez, Z. He, D.K. Wehe, Y.F. Du. “Estimate of large CZT detectors absolute efficiency”. To be published at IEEE Transactions on Nuclear Science Vol. August 2002.

· J.M. Pérez, Z. He, D.K. Wehe. “Stability and characteristics of large CZT coplanar electrode detectors”. IEEE Transactions on Nuclear Science, Vol. 48, No 3, pp 272-277 , June 2001.

. “Current transport in Large Coplanar and Pixel Au-CdZnTe detectors”. J.M. Pérez. Sent to publication at Nuclear Instruments and Methods in Phisics Research A on May 2002

Pixel CZT bulk I-V curve (grid floating)

0.0E+00

1.0E-08

2.0E-08

3.0E-08

4.0E-08

5.0E-08

6.0E-08

0 500 1000 1500 2000|V| (volts)

| I |

(A)

Negative Branch

Positive branch





On going proposals:On going proposals:

1. Development of epitaxial structures of compound semiconductors formed by elements with high atomic number

• Collaboration agreement contract with Microelectronics National Center (CSIC)• Research focused to Nuclear Medicine• Funding pending

2. Characterization and design of new generation sensors based on CZT for environmental applications

• Applied research on coplanar detectors• Collaboration with the University of Michigan• Research focused for Environmental and Decommissioning Industries• Funded by MCYT-Spain (TIC2002-02367)





3. EuroMedIm. Expression of Interest for the 6th EC Framework Programme

• A large number of European institutions aimed at developing prototype diagnosis instrumentation for medical to be transferred toi the European Industry

Documents

Highlights of space sensor developments in Spain 1st SPACERAD meeting Brussels, 12 November 2002