ARCS
ARCS is a direct-geometry, wide angular-range spectrometer at the Oak Ridge National Laboratory. [1]
References
Versions
ARCS (default)
ARCS
For details on the parameters associated with the ARCS version, please see the ARCS data.
Models
PyChop_fit (default)
PyChop_fit
This is the recommended PyChop_fit model - it is an alias for the PyChop_fit_v2 model, which is the model actually containing the data.
Important
PyChop_fit refers to the best version of this model - using a specific version may run the risk using a model with known bugs or other issues and is not advisable unless replicating the results of a given version of the model.
PyChop_fit_v1
This section contains the data for the ARCS instrument associated with the PyChop_fit_v1 model. For more information about how the model works and its implementation, please see resins.models.pychop.PyChopModelFermi. For more information on the model parameters, please see PyChop_fit_v1 model data.
Configurations:
PyChop_fit_v2
This section contains the data for the ARCS instrument associated with the PyChop_fit_v2 model. For more information about how the model works and its implementation, please see resins.models.pychop.PyChopModelFermi. For more information on the model parameters, please see PyChop_fit_v2 model data.
Configurations:
Data
name: "ARCS"
default_version: "ARCS"
version:
ARCS:
default_model: "PyChop_fit"
models:
PyChop_fit: "PyChop_fit_v2"
PyChop_fit_v1:
function: "pychop_fit_fermi"
citation: ['Jiao Y.Y. Lin et. al., Phys. B, Volume 562, 2019, Pages 26-30, https://doi.org/10.1016/j.physb.2018.11.027', 'R. I. Bewley, R. A. Ewings, M. D. Le, T. G. Perring and D. J. Voneshen, 2018. PyChop', 'https://mantidproject.github.io/docs-versioned/v6.10.0/interfaces/direct/PyChop.html']
parameters:
d_chopper_sample: 2.0
d_sample_detector: 3.0
aperture_width: 0.1751
theta: -13.75
defaults:
e_init: 200
chopper_frequency: 300
restrictions:
e_init: [20, 1500]
chopper_frequency: [60, 601, 60]
frequency_matrix: [[1]]
moderator:
type: 1
scaling_function: None
scaling_parameters: None
measured_wavelength: None
measured_width: None
parameters: [119.63, 33.618, 0.037, 0.17, 172.42]
detector:
type: 2
phi: 0.0
depth: 0.025
sample:
type: 0
thickness: "2e-3"
width: 0.048
height: 0.048
gamma: 0.0
choppers:
Fermi:
distance: 11.61
aperture_distance: 9.342
configurations:
chopper_package:
default_option: "ARCS-100-1.5-AST"
SEQ-100-2.0-AST:
pslit: 0.00203
radius: 0.05
rho: 0.58
tjit: 0.0
SEQ-700-3.5-AST:
pslit: 0.00356
radius: 0.05
rho: 1.535
tjit: 0.0
ARCS-100-1.5-AST:
pslit: 0.00152
radius: 0.05
rho: 0.58
tjit: 0.0
ARCS-700-1.5-AST:
pslit: 0.00152
radius: 0.05
rho: 1.535
tjit: 0.0
ARCS-700-0.5-AST:
pslit: 0.00051
radius: 0.05
rho: 1.535
tjit: 0.0
ARCS-100-1.5-SMI:
pslit: 0.00152
radius: 0.05
rho: 0.58
tjit: 0.0
ARCS-700-1.5-SMI:
pslit: 0.00152
radius: 0.05
rho: 1.535
tjit: 0.0
PyChop_fit_v2:
function: "pychop_fit_fermi"
citation: ['Jiao Y.Y. Lin et. al., Phys. B, Volume 562, 2019, Pages 26-30, https://doi.org/10.1016/j.physb.2018.11.027', 'R. I. Bewley, R. A. Ewings, M. D. Le, T. G. Perring and D. J. Voneshen, 2018. PyChop', 'https://mantidproject.github.io/docs-versioned/v6.10.0/interfaces/direct/PyChop.html']
parameters:
d_chopper_sample: 2.0
d_sample_detector: 3.0
aperture_width: 0.1751
theta: -13.75
defaults:
e_init: 200
chopper_frequency: 300
restrictions:
e_init: [20, 1500]
chopper_frequency: [60, 601, 60]
frequency_matrix: [[1]]
moderator:
type: 1
scaling_function: None
scaling_parameters: None
measured_wavelength: None
measured_width: None
parameters: [281.0, 79.0, 0.087, 0.4, 172.0]
detector:
type: 2
phi: 0.0
depth: 0.025
sample:
type: 0
thickness: "2e-3"
width: 0.048
height: 0.048
gamma: 0.0
choppers:
Fermi:
distance: 11.61
aperture_distance: 9.342
configurations:
chopper_package:
default_option: "ARCS-100-1.5-AST"
SEQ-100-2.0-AST:
pslit: 0.00203
radius: 0.05
rho: 0.58
tjit: 0.0
SEQ-700-3.5-AST:
pslit: 0.00356
radius: 0.05
rho: 1.535
tjit: 0.0
ARCS-100-1.5-AST:
pslit: 0.00152
radius: 0.05
rho: 0.58
tjit: 0.0
ARCS-700-1.5-AST:
pslit: 0.00152
radius: 0.05
rho: 1.535
tjit: 0.0
ARCS-700-0.5-AST:
pslit: 0.00051
radius: 0.05
rho: 1.535
tjit: 0.0
ARCS-100-1.5-SMI:
pslit: 0.0015
radius: 0.05
rho: 0.64
tjit: 0.0
ARCS-700-1.5-SMI:
pslit: 0.0015
radius: 0.05
rho: 1.535
tjit: 0.0