Presentation is loading. Please wait.

Presentation is loading. Please wait.

1 A.I.Ryazanov, E.V.Semenov and A.Ferrari DPA calculations in irradiated graphite collimator materials under 7 TeV and 450 GeV proton beams 06.03.2015,

Published byAnastasia Robinson Modified over 9 years ago

Similar presentations

Presentation on theme: "1 A.I.Ryazanov, E.V.Semenov and A.Ferrari DPA calculations in irradiated graphite collimator materials under 7 TeV and 450 GeV proton beams 06.03.2015,"— Presentation transcript:

1 1 A.I.Ryazanov, E.V.Semenov and A.Ferrari DPA calculations in irradiated graphite collimator materials under 7 TeV and 450 GeV proton beams 06.03.2015, CERN, Geneva, Switzerland National Research Centre” Kurchatov Institute” European Organization for Nuclear Research

2 2 Energy flux of secondary protons formed in graphite at different distances along the beam of 7 TeV protons 06.03.2015, CERN, Geneva, Switzerland

3 3 Energy flux of secondary electrons formed in graphite at different distances along the beam of 7 TeV protons 06.03.2015, CERN, Geneva, Switzerland

4 4 Energy flux of secondary charged pi-mesons formed in graphite at different distances along the beam of 7 TeV protons 06.03.2015, CERN, Geneva, Switzerland

5 5 Cumulative energy flux of secondary neutrons formed in graphite at different distances along the beam 7 TeV protons 06.03.2015, CERN, Geneva, Switzerland

6 6 Displacement cross-section 06.03.2015, CERN, Geneva, Switzerland - Differential cross-section of secondary particles (neutrons and others) with kinetic energy E to interact with target graphite atom, that will have energy T. ν (T) is the cascade function (number of collisions created by primary knock-on atom with energy T), i is the index of summation over various nuclear reaction channels.

7 06.03.2015, CERN, Geneva, Switzerland

8 8 Cascade function 06.03.2015, CERN, Geneva, Switzerland are atomic numbers of incident and target atoms, respectively, and - Bohr radius, and - displacement energy, are atomic masses of incident and target atoms, respectively,

9 The crystal structure of graphite showing the ABAB stacking sequence of graphene planes in which the carbon atoms have three fold coordination. 06.03.2015, CERN, Geneva, Switzerland The value of E d lies between 24 and 60 eV. (E d =25eV)

10 10 Differential cross-section of electrons and charged pions 06.03.2015, CERN, Geneva, Switzerland McKinley and Feshbach formula for low-Z materials

11 11 Displacement cross-section of secondary neutrons formed in graphite under 7 TeV proton beam irradiation 06.03.2015, CERN, Geneva, Switzerland

12 12 Displacement generation rate of point defect production 06.03.2015, CERN, Geneva, Switzerland G d = n p is the total number of protons in a bunch(1.1*10 11 ), τ is the time gap between bunches (26 ns), Ф(Е) is the energy spectrum of secondary particles having energy E and interacting with graphite atoms, σ d (E) is the cross section of defect formation with the secondary particle energy E.

13 13 Displacement rate of DPA produced by secondary protons at different distances along the beam of 7 TeV protons per each bunch 06.03.2015, CERN, Geneva, Switzerland

14 14 Displacement rate of DPA produced by secondary pions at different distances along the beam of 7 TeV protons per each bunch 06.03.2015, CERN, Geneva, Switzerland

15 15 Displacement rate of DPA produced by secondary neutrons under 7 TeV proton beam irradiation per each bunch 06.03.2015, CERN, Geneva, Switzerland

16 16 The spectrum of pions (π - ) produced in graphite at different distances along the beam of 450 GeV protons (FLUKA) 06.03.2015, CERN, Geneva, Switzerland

17 17 Displacement cross sections for secondary pions with energies up to 450 GeV in graphite 06.03.2015, CERN, Geneva, Switzerland

18 Cross section of defect formation for secondary π – mesons in graphite near 450 GeV proton beam

19 19 Generation rate of primary radiation point defects (DPA) in graphite versus energy of pions at different distances along the beam of 450 GeV protons per each bunch 06.03.2015, CERN, Geneva, Switzerland

20 20 The spectrum of secondary relativistic electrons produced in graphite at different distances along the beam of 450 GeV protons (FLUKA) 06.03.2015, CERN, Geneva, Switzerland

21 21 Displacement cross sections for secondary electrons with energies up to 450 GeV in graphite 06.03.2015, CERN, Geneva, Switzerland

22 22 Generation rate of primary radiation point defects (DPA) in graphite versus energy of secondary electrons at different distances along the beam of 450 GeV protons per each bunch 06.03.2015, CERN, Geneva, Switzerland

23 23 Energy spectra of secondary neutrons formed as a result of interaction of 450 GeV proton beam with graphite along beam axis 06.03.2015, CERN, Geneva, Switzerland

24 24 Generation rate of point defect formation (DPA) under irradiation by secondary neutrons along axis of 450 GeV proton beam 06.03.2015, CERN, Geneva, Switzerland

25 25 Conclusion Maximum of displacement rates for 7 TeV protons correspond to the following secondary particles: Protons – 0.012 dpa/s per proton bunch Pions – 0.11 dpa/s per proton bunch Neutrons – 0.018 dpa/s per proton bunch Maximum of displacement rates for 450 GeV protons correspond to the following secondary particles: Electrons – 4e-3 dpa/s per proton bunch Pions – 4.3e-3 dpa/s per proton bunch Neutrons – 4e-3 dpa/s per proton bunch

26 26 Thank you very much for your attention! Thank you very much for your attention!

Download ppt "1 A.I.Ryazanov, E.V.Semenov and A.Ferrari DPA calculations in irradiated graphite collimator materials under 7 TeV and 450 GeV proton beams 06.03.2015,"

Similar presentations

Stefan Roesler SC-RP/CERN on behalf of the CERN-SLAC RP Collaboration

Stefan Roesler SC-RP/CERN on behalf of the CERN-SLAC RP Collaboration
Preliminary studies for T2 primary target for the NA61 fragmentation beam run 11 th October 2010 – NA61 Collaboration Meeting M. Calviani on behalf of.

Preliminary studies for T2 primary target for the NA61 fragmentation beam run 11 th October 2010 – NA61 Collaboration Meeting M. Calviani on behalf of.
Simulation of Neutrino Factory beam and quasielastic scattering off electrons in the near detector Yordan Karadzhov University of Sofia “St. Kliment Ohridski”

Simulation of Neutrino Factory beam and quasielastic scattering off electrons in the near detector Yordan Karadzhov University of Sofia “St. Kliment Ohridski”
Anomalous Pion Production in High Energy Particle Collisions Alexander Bylinkin, Andrey Rostovtsev XV Moscow School of Physics XXXX ITEP Winter School.

Anomalous Pion Production in High Energy Particle Collisions Alexander Bylinkin, Andrey Rostovtsev XV Moscow School of Physics XXXX ITEP Winter School.
Radiopharmaceutical Production

Radiopharmaceutical Production
EXAMPLE DATA: Beam: K - ; E = 4,2 GeV ; m K =m p /2 Target: Hydrogen atoms; R nucleus =10 -5 R atom me = mp/2000.

EXAMPLE DATA: Beam: K - ; E = 4,2 GeV ; m K =m p /2 Target: Hydrogen atoms; R nucleus =10 -5 R atom me = mp/2000.
Ion Beam Analysis techniques:

Ion Beam Analysis techniques:
Particle Accelerators

Particle Accelerators
Pion yield studies for proton drive beams of 2-8 GeV kinetic energy for stopped muon and low-energy muon decay experiments Sergei Striganov Fermilab Workshop.

Pion yield studies for proton drive beams of 2-8 GeV kinetic energy for stopped muon and low-energy muon decay experiments Sergei Striganov Fermilab Workshop.
Neutral Particles. Neutrons Neutrons are like neutral protons. –Mass is 1% larger –Interacts strongly Neutral charge complicates detection Neutron lifetime.

Neutral Particles. Neutrons Neutrons are like neutral protons. –Mass is 1% larger –Interacts strongly Neutral charge complicates detection Neutron lifetime.
Particle Interactions

Particle Interactions
Radiation therapy is based on the exposure of malign tumor cells to significant but well localized doses of radiation to destroy the tumor cells. The.

Radiation therapy is based on the exposure of malign tumor cells to significant but well localized doses of radiation to destroy the tumor cells. The.
Centre de Toulouse Radiation interaction with matter 1.

Centre de Toulouse Radiation interaction with matter 1.
NEEP 541 Radiation Interactions Fall 2003 Jake Blanchard.

NEEP 541 Radiation Interactions Fall 2003 Jake Blanchard.
“Influence of atomic displacement rate on radiation-induced ageing of power reactor components” Ulyanovsk, 3 -7 October 2005 Displacement rates and primary.

“Influence of atomic displacement rate on radiation-induced ageing of power reactor components” Ulyanovsk, 3 -7 October 2005 Displacement rates and primary.
Overview of ‘classical’ or ‘standardized’ DPA calculation stemming from the reactor world. Colin English NNL.

Overview of ‘classical’ or ‘standardized’ DPA calculation stemming from the reactor world. Colin English NNL.
Chapter 2 Particle accelerators: From basic to applied research Rüdiger Schmidt (CERN) – 2011 - Version E1.0.

Chapter 2 Particle accelerators: From basic to applied research Rüdiger Schmidt (CERN) – Version E1.0.
Future usage of quasi-infinite depleted uranium target (BURAN) for benchmark studies Pavel Tichý Future usage of quasi-infinite depleted uranium target.

Future usage of quasi-infinite depleted uranium target (BURAN) for benchmark studies Pavel Tichý Future usage of quasi-infinite depleted uranium target.
Exploring Parameter Space for Radiation Effects in SC Magnets FermilabAccelerator Physics Center Nikolai Mokhov Fermilab With contributions from A. Konobeyev,

Exploring Parameter Space for Radiation Effects in SC Magnets FermilabAccelerator Physics Center Nikolai Mokhov Fermilab With contributions from A. Konobeyev,
Self-similarity of hadron production in pp and AA collisions at high energies D.A. Artemenkov, G.I. Lykasov, A.I. Malakhov Joint Institute for Nuclear.

Self-similarity of hadron production in pp and AA collisions at high energies D.A. Artemenkov, G.I. Lykasov, A.I. Malakhov Joint Institute for Nuclear.

Similar presentations

Ads by Google