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Analysis of Radiation Background: ATLAS-MPX Data vs. Simulations

This presentation discusses the calibration and simulation results of the ATLAS-MPX detector, focusing on low energy transfer particles (LETP) from various radiation sources, including 60Co and 137Cs. Key findings include the simulated response to LETP particles, including the number of electron tracks and energy deposited in the detector. The analysis covers the contribution of primary particles to electron track generation and introduces the ATLAS-MPX upgrade, highlighting advancements in particle detection and identification techniques. The meeting in Prague (15-17 February 2011) aims to address interpretations in radiation measurement and data access.

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Analysis of Radiation Background: ATLAS-MPX Data vs. Simulations

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  1. Radiation background -ATLAS-MPX data vs. simulations Stanislav Pospisil, Jaroslav Solc, Michal Suk, Daniel Turecek and Zdenek Vykydal Institute ofExperimental and AppliedPhysics, CTU in Prague, Horská 3a/22, 12800 Praha 2, Czech Republic Claude Leroy and Paul Soueid Université de Montréal, Montréal (Québec), H3C 3J7, Canada ATLAS-MPX collaboration

  2. Low Energy Transfer Particles comparison Calibrated response of ATLAS-MPX (Czech Metrological Institute) : • 60Co - (1.95±0,16)E-10 Gy/track • 137Cs - (1.42±0,07)E-10 Gy/track Simulated response of ATLAS-MPX to LETP particles: • Input data for MPX01 from Charlie Young applied by JaroslavSolc to the detailed model of ATLAS-MPX response (including all convertors, box, simplified electronics, etc.). The calculated quantities are: • number of particles of each type entered the sensor chip (i.e. particle flux) • number of electrons which deposited in the sensor chip energy > 7 keV (i.e., number of (registered) tracks; no upper energy limit to treat the particle as LETP so far) • the sum of energy deposited by each electron in the sensor chip (energy > 7 keV, i.e. dose) • Subsequently it is possible to find simulated response: • number of electron tracks caused by photons entering the device (i.e. electron tracks caused by electrons created inside the device) • number of electron tracks caused by electrons entering the device • dose-to-silicon per electron track Z. Vykydal - Radiation background - ATLAS-MPX data vs. simulations

  3. Low Energy Transfer Particles comparison Calibrated response of ATLAS-MPX (Czech Metrological Institute): • 60Co - (1.95±0,16)E-10 Gy/track • 137Cs - (1.42±0,07)E-10 Gy/track Simulated response of ATLAS-MPX to LETP particles: • Number of LETP tracks caused by each type of primary particles entering the device: • 74% of tracks caused by primary electrons • 25% of tracks caused by primary photons • 1% of tracks caused by primary neutrons • Dose-to-track ratio: 1.82E-10 Gy/track Z. Vykydal - Radiation background - ATLAS-MPX data vs. simulations

  4. Topics to discuss in Prague • High Energy Transfer particles to dose calculation • Charged hadrons • Ions • Neutrons • How to interpret MIP signal • Interpretation of HETP for understanding ofSEE • contact person for ATLAS • How to access and use ATLAS-MPX data • see short demonstration by Daniel Turecek Z. Vykydal - Radiation background - ATLAS-MPX data vs. simulations

  5. ATLAS-MPX upgrade 2013-2014 • Timepix chip • Direct energy deposition • Time of arrival of the particles (ToF) • Multilayer detector concept • Better particle identification • Directional sensitivity • More advanced cluster analysis Z. Vykydal - Radiation background - ATLAS-MPX data vs. simulations

  6. Detailsof Prague meeting • Date: 15 - 17.2.2011 • Place: IEAP CTU, Horská 3a/22, Praha 2 • www.utef.cvut.cz • Accomodation: • http://www.usemika.cz • http://www.hotelunion.cz • http://www.kingcharles.cz/ Z. Vykydal - Radiation background - ATLAS-MPX data vs. simulations

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