Summary of simulation results at the NEAR Station (February 2021)

See previous page for the NEAR Station setup configurations.

Filter material in all cases: Boron Carbide (B4C)
Filter thickness grid [cm] : 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

M81: No-moderator

no moderator

ID	BPE thickness [cm]	moderator	scoring position	flux [n/cm2/pp]	B filter thickness [cm]	filtered flux [n/cm2/pp]	full numerical printout	input nspectrum file
M81	30	-	27	0.39641E+09	1.0	0.23095E+09	No-moderator	M81-input-nspectrum

Neutron flux for plain and Boron (1 cm) filtered beams

Comparison to a maxwellian spectrum and cumulative SACS

Movie frames for different the filter thickness grid

M82: Shelf-position-light

moderator on the shelf, 25 kg

ID	BPE thickness [cm]	moderator	scoring position	flux [n/cm2/pp]	B filter thickness [cm]	filtered flux [n/cm2/pp]	full numerical printout	input nspectrum file
M82	30	AlF3	27	0.13209E+09	1.0	0.68262E+08	Shelf-position-light	M82-input-nspectrum

Neutron flux for plain and Boron (1 cm) filtered beams

Comparison to a maxwellian spectrum and cumulative SACS

Movie frames for different the filter thickness grid

M83: Shelf-position-heavy

moderator on the shelf, 40 kg

ID	BPE thickness [cm]	moderator	scoring position	flux [n/cm2/pp]	B filter thickness [cm]	filtered flux [n/cm2/pp]	full numerical printout	input nspectrum file
M83	30	AlF3	27	0.92037E+08	1.0	0.42789E+08	Shelf-position-heavy	M83-input-nspectrum

Neutron flux for plain and Boron (1 cm) filtered beams

Comparison to a maxwellian spectrum and cumulative SACS

Movie frames for different the filter thickness grid

M84: Al-moderator

pure Aluminum moderator, 40 kg

ID	BPE thickness [cm]	moderator	scoring position	flux [n/cm2/pp]	B filter thickness [cm]	filtered flux [n/cm2/pp]	full numerical printout	input nspectrum file
M84	30	Al	27	0.12942E+09	1.0	0.66439E+08	Al-moderator	M84-input-nspectrum

Neutron flux for plain and Boron (1 cm) filtered beams

Comparison to a maxwellian spectrum and cumulative SACS

Movie frames for different the filter thickness grid

M85: AlF3+BPE-moderator

AlF3(10cm) + BPE(10cm) moderator, 40 kg

ID	BPE thickness [cm]	moderator	scoring position	flux [n/cm2/pp]	B filter thickness [cm]	filtered flux [n/cm2/pp]	full numerical printout	input nspectrum file
M85	30	AlF3+BPE	27	0.52383E+08	1.0	0.24586E+08	AlF3+BPE-moderator	M85-input-nspectrum

Neutron flux for plain and Boron (1 cm) filtered beams

Comparison to a maxwellian spectrum and cumulative SACS

Movie frames for different the filter thickness grid

M86: Al+BPE-moderator

Al(10cm) + BPE(10cm) moderator, 40 kg

ID	BPE thickness [cm]	moderator	scoring position	flux [n/cm2/pp]	B filter thickness [cm]	filtered flux [n/cm2/pp]	full numerical printout	input nspectrum file
M86	30	Al+BPE	27	0.53485E+08	1.0	0.26267E+08	Al+BPE-moderator	M86-input-nspectrum

Neutron flux for plain and Boron (1 cm) filtered beams

Comparison to a maxwellian spectrum and cumulative SACS

Movie frames for different the filter thickness grid

M91: No-moderator

no moderator

ID	BPE thickness [cm]	moderator	scoring position	flux [n/cm2/pp]	B filter thickness [cm]	filtered flux [n/cm2/pp]	full numerical printout	input nspectrum file
M91	30	-	30	0.55493E+11	1.0	0.22687E+11	No-moderator	M91-input-nspectrum

Neutron flux for plain and Boron (1 cm) filtered beams

Comparison to a maxwellian spectrum and cumulative SACS

Movie frames for different the filter thickness grid

M92: Shelf-position-light

moderator on the shelf, 25 kg

ID	BPE thickness [cm]	moderator	scoring position	flux [n/cm2/pp]	B filter thickness [cm]	filtered flux [n/cm2/pp]	full numerical printout	input nspectrum file
M92	30	AlF3	30	0.42160E+11	1.0	0.15195E+11	Shelf-position-light	M92-input-nspectrum

Neutron flux for plain and Boron (1 cm) filtered beams

Comparison to a maxwellian spectrum and cumulative SACS

Movie frames for different the filter thickness grid

M93: Shelf-position-heavy

moderator on the shelf, 40 kg

ID	BPE thickness [cm]	moderator	scoring position	flux [n/cm2/pp]	B filter thickness [cm]	filtered flux [n/cm2/pp]	full numerical printout	input nspectrum file
M93	30	AlF3	30	0.38898E+11	1.0	0.13383E+11	Shelf-position-heavy	M93-input-nspectrum

Neutron flux for plain and Boron (1 cm) filtered beams

Comparison to a maxwellian spectrum and cumulative SACS

Movie frames for different the filter thickness grid

M94: Al-moderator

pure Aluminum moderator, 40 kg

ID	BPE thickness [cm]	moderator	scoring position	flux [n/cm2/pp]	B filter thickness [cm]	filtered flux [n/cm2/pp]	full numerical printout	input nspectrum file
M94	30	Al	30	0.41498E+11	1.0	0.15009E+11	Al-moderator	M94-input-nspectrum

Neutron flux for plain and Boron (1 cm) filtered beams

Comparison to a maxwellian spectrum and cumulative SACS

Movie frames for different the filter thickness grid

M95: AlF3+BPE-moderator

AlF3(10cm) + BPE(10cm) moderator, 40 kg

ID	BPE thickness [cm]	moderator	scoring position	flux [n/cm2/pp]	B filter thickness [cm]	filtered flux [n/cm2/pp]	full numerical printout	input nspectrum file
M95	30	AlF3+BPE	30	0.33209E+11	1.0	0.11218E+11	AlF3+BPE-moderator	M95-input-nspectrum

Neutron flux for plain and Boron (1 cm) filtered beams

Comparison to a maxwellian spectrum and cumulative SACS

Movie frames for different the filter thickness grid

M96: Al+BPE-moderator

Al(10cm) + BPE(10cm) moderator, 40 kg

ID	BPE thickness [cm]	moderator	scoring position	flux [n/cm2/pp]	B filter thickness [cm]	filtered flux [n/cm2/pp]	full numerical printout	input nspectrum file
M96	30	Al+BPE	30	0.33646E+11	1.0	0.11503E+11	Al+BPE-moderator	M96-input-nspectrum

Neutron flux for plain and Boron (1 cm) filtered beams

Comparison to a maxwellian spectrum and cumulative SACS

Movie frames for different the filter thickness grid

Integrated Flux

ID	setup	Total [n/cm2/pp]	E < 1 keV	1 keV < E < 1 MeV	E > 1 MeV
M81	No-moderator	3.9641e+08	1.9301e+07	2.4557e+08	1.3154e+08
M82	Shelf-position-light	1.3209e+08	1.5372e+07	7.5527e+07	4.1196e+07
M83	Shelf-position-heavy	9.2037e+07	1.4823e+07	5.2430e+07	2.4785e+07
M84	Al-moderator	1.2942e+08	1.5303e+07	7.8492e+07	3.5620e+07
M85	AlF3+BPE-moderator	5.2383e+07	1.1219e+07	2.3923e+07	1.7241e+07
M86	Al+BPE-moderator	5.3485e+07	1.1024e+07	2.2937e+07	1.9524e+07
M91	No-moderator	5.5493e+10	1.0668e+10	3.9751e+10	5.0741e+09
M92	Shelf-position-light	4.2160e+10	1.0467e+10	2.8952e+10	2.7411e+09
M93	Shelf-position-heavy	3.8898e+10	1.0394e+10	2.6325e+10	2.1788e+09
M94	Al-moderator	4.1498e+10	1.0316e+10	2.8619e+10	2.5626e+09
M95	AlF3+BPE-moderator	3.3209e+10	9.4801e+09	2.1899e+10	1.8291e+09
M96	Al+BPE-moderator	3.3646e+10	9.4573e+09	2.2271e+10	1.9183e+09

-- AlbertoMengoni - 2021-02-14