1 / 10

Dose rate calculation in crystals of M0` test beam Presented by Andrei Uzunian, IHEP

Dose rate calculation in crystals of M0` test beam Presented by Andrei Uzunian, IHEP. Outline. Absorbed dose definition Dose rate profiles in crystals ( 120 Gev electrons, 150 GeV pions) Dose rate estimation for e &  irradiations. Absorbed dose definition. E`. E.

greg
Download Presentation

Dose rate calculation in crystals of M0` test beam Presented by Andrei Uzunian, IHEP

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Dose rate calculation in crystals of M0` test beam Presented by Andrei Uzunian, IHEP

  2. Outline • Absorbed dose definition • Dose rate profiles in crystals • ( 120 Gev electrons, 150 GeV pions) • Dose rate estimation for e &  • irradiations

  3. Absorbed dose definition E` E As a reminder: E V, m Absorbed dose, D = E / m(v),v  0 1 Gy = 1 J/kg = 6.24 106 GeV/g = 100 rad

  4. Dose rate profiles (120 GeV electrons) Single crystal:2.3 x 2.3 x 23 cm3 Gaussian beam x = y = 0.1 cm x = y = 0.5 cm beam beam

  5. Dose rate profiles (150 GeV pions ) Single crystal:2.3 x 2.3 x 23 cm3 Gaussian beam x = y = 0.1 cm x = y = 0.5 cm

  6. Dose rate profiles 5x5 PWO matrix Dose rate profiles in central Xtal of 5x5 matrix Gaussian beam : beam Pions, 150 GeV Electrons, 120 GeV x = y= 0.5 cm x = y= 0.5 cm x = y= 2 cm x = y= 2 cm Longitudinal dose rate profiles in PWO crystal (2.3x2.3x23 cm3 ). MC simulation

  7. Dose rate profiles 5x5 PWO matrix Dose rate profiles in central Xtal of 5x5 matrix Uniform beam:5 x 5 mm2 & 23 x 23 mm2 beam Electrons Pions E = 120 GeV, Intensity = 105 e/s E = 150 GeV, Intensity = 105 pi/s 5x5 mm2 uniform beam 5x5 mm2 uniform beam 22x22 mm2 uniform beam 22x22 mm2 uniform beam Longitudinal dose rate profiles in PWO crystal (2.3x2.3x23 cm3 ). MC simulation

  8. M0’ irradiations data ECAL M0’ Testbeam Meeting, 25 September 2002 “DAQ-Trigger-data etc “ by J.Bourotte/J.Fay # 1566 # 1486 V.Katchanov, A.Uzunian, V.Grishin CERN, February 2003

  9. Dose rate estimation Electrons 120 Gev, dose rate in shower max Crystal # 1652(intensity on Xtal = 1.5 x103 e/s )20 rad/hour Pions 150 Gev, dose rate on plateau Xtal “DAQ-Trigger-data etc “ Ann Van Lysebetten private communication, 25.09.02 by J.Bourotte/J.Fay as I understood … #1486 1.7 x104/s 25 rad/hour 8 x105/s 160 rad/h 8 x105/s 800 rad/h #1566 2.7 x104/s 40 rad/hour 7x105/s 140 rad/h 7x105/s 700 rad/h Intensity for gaussian beam: x = y = 2 cm on 5x5 matrix Intensity on Xtal Intensity on Xtal dose rate dose rate dose rate

  10. Conclusion • To estimate the dose rate profiles in crystal under irradiation one need to know ( from M0` data): • the number of incident particles on the crystal front • and/or • the beam profile on the crystal matrix • and/or • the total energy absorbed in crystal during irradiation

More Related