[ Identification | Description | Input parameters | Output parameters | Links ]
DiskChopper
ComponentModels a disc chopper with n identical slits, which are symmetrically disposed on the disc. At time t=0, the centre of the first slit opening will be situated at the vertical axis. Possibly, the slits can have central absorbing inserts ('beamstops'). For more complicated gemometries, see component manual example of DiskChopper GROUPing. If the chopper is the 1st chopper of the instrument, it sets t time with phase - Only relevant for when using continuous source modules. Example: DiskChopper(R=0.2, theta_0=10, omega=2500.0, n=3, t_0=0, IsFirst=1) First chopper DiskChopper(R=0.2, theta_0=10, omega=2500.0, n=3, t_0=0, IsFirst=0) Example values: theta_0=10 h=0.2 R=0.5 omega=2500 n=3 t_0=0 n_pulse=1 j=0 wc=0
Name | Unit | Description | Default |
---|---|---|---|
theta_0 | deg | Angular width of the slits. | |
R | m | Radius of the disc | |
h | m | Slit height (if = 0, equal to R). Auto centering of beam at h/2. | 0 |
omega | rad/s | Angular frequency of the Chopper (algebraic sign defines the direction of rotation) | |
n | 1 | Number of slits | 3 |
j | s | Jitter in the phase | 0 |
theta_1 | deg | Angular width of optional beamstop in chopper windows | 0 |
t_0 | s | Time 'delay'. | 0 |
IsFirst | 0/1 | Set it to 1 for the first chopper position in a cw source (it then spreads the neutron time distribution) | 0 |
n_pulse | 1 | Number of pulses (Only if IsFirst) | 1 |
abs_out | 0/1 | Absorb neutrons hitting outside of chopper radius? | 1 |
phi_0 | deg | Angular 'delay' (suppresses t_0) | 0 |
w | m | 'width' of slits for compatibility with Chopper.comp | 0 |
wc | m | 'width' of beamstops for compatibility with Chopper.comp | 0 |
compat | 1 | Chopper placement compatible with original Chopper.comp | 0 |
Name | Unit | Description | Default |
---|---|---|---|
Tg | |||
T | |||
To | |||
Tc | |||
delta_y | |||
height |
DiskChopper.comp
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[ Identification | Description | Input parameters | Output parameters | Links ]
Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Fri Feb 11 10:12:09 2011