pcdsdevices.ipm.IPM_Wave8

class pcdsdevices.ipm.IPM_Wave8(prefix, *, name, prefix_wave8, prefix_ioc=None, **kwargs)

Standard intensity position monitor.

This is an InOutRecordPositioner that moves the target position to any of the four set positions, or out. Valid states are (1, 2, 3, 4, 5) or the equivalent (TARGET1, TARGET2, TARGET3, TARGET4, OUT). IPMs each also have a diode, which is implemented as the diode attribute of this class. This can easily be controlled using ipm.diode.insert() or ipm.diode.remove().

has a wave8 component which represents the Wave8 used for readout.

Parameters

• prefix (str) – The EPICS PV prefix for this motor.

• name (str) – An identifying name for this motor.

• settle_time (float, optional) – The amount of extra time to wait before interpreting a move as done.

• timeout (float, optional) – The amount of time to wait before automatically marking a long in-progress move as failed.

Ophyd Device Components

Attribute	Class	Suffix	Docs	Kind	Notes
target	IPMTarget	:TARGET		normal	Inherited from IPMMotion
diode	IPMDiode	:DIODE		normal	Inherited from IPMMotion
wave8 (FCpt)	Wave8	{self.prefix_wave8}		normal

Methods

channel(i=0)

Returns the detector’s specified channel.

configure()

Configure the device for something during a run

This default implementation allows the user to change any of the configuration_attrs. Subclasses might override this to perform additional input validation, cleanup, etc.

Parameters

d (dict) – The configuration dictionary. To specify the order that the changes should be made, use an OrderedDict.

Returns

• (old, new) tuple of dictionaries

• Where old and new are pre- and post-configure configuration states.

describe() → ophyd.device.OrderedDictType[str, Dict[str, Any]]

Provide schema and meta-data for read().

This keys in the OrderedDict this method returns must match the keys in the OrderedDict return by read().

This provides schema related information, (ex shape, dtype), the source (ex PV name), and if available, units, limits, precision etc.

Returns

data_keys (OrderedDict) – The keys must be strings and the values must be dict-like with the event_model.event_descriptor.data_key schema.

get(**kwargs)

Get the value of all components in the device

Keyword arguments are passed onto each signal.get(). Components beginning with an underscore will not be included.

insert(moved_cb=None, timeout=None, wait=False)

Move both the target and diode in.

post_elog_status()

Post device status to the primary elog, if possible.

read() → ophyd.device.OrderedDictType[str, Dict[str, Any]]

Read data from the device.

This method is expected to be as instantaneous as possible, with any substantial acquisition time taken care of in trigger().

The OrderedDict returned by this method must have identical keys (in the same order) as the OrderedDict returned by describe().

By convention, the first key in the return is the ‘primary’ key and maybe used by heuristics in bluesky.

The values in the ordered dictionary must be dict (-likes) with the keys {'value', 'timestamp'}. The 'value' may have any type, the timestamp must be a float UNIX epoch timestamp in UTC.

Returns

data (OrderedDict) – The keys must be strings and the values must be dict-like with the keys {'value', 'timestamp'}

read_configuration() → ophyd.device.OrderedDictType[str, Dict[str, Any]]

Dictionary mapping names to value dicts with keys: value, timestamp

To control which fields are included, change the Component kinds on the device, or modify the configuration_attrs list.

remove(moved_cb=None, timeout=None, wait=False)

Moves the target out of the beam and removes the diode if it is in an unknown state.

stage_group_instances() → collections.abc.Iterator[ophyd.ophydobj.OphydObject]

Yields an iterator of subdevices that should be staged.

status() → str

Returns a str with the current pv values for the device.

stop(*, success=False)

Stop the Device and all (instantiated) subdevices

sum()

Returns the detector’s sum value.

summary()

target_in(target_num, moved_cb=None, timeout=None, wait=False)

Moves the target to one of the target positions. There are 4 targets with different thickness and absorption/signal. The targets move vertically. To drive them in, use presets: ipm.target_in(x), where x = target number

Parameters

• target (int) – Number of which target to move in. Must be one of the valid target states: 1-4 or out: 5 (TARGET1, TARGET2, TARGET3, TARGET4, OUT) respectively

• moved_cb (callable, optional) – Function to be run when the operation finishes. This callback should not expect any arguments or keywords.

• timeout (float, optional) – Maximum time for the motion. If None is given, the default value of this positioner is used.

• wait (bool) – If True, block until move is completed.

Returns

status (MoveStatus)

trigger() → ophyd.status.StatusBase

Trigger the device and return status object.

This method is responsible for implementing ‘trigger’ or ‘acquire’ functionality of this device.

If there is an appreciable time between triggering the device and it being able to be read (via the read() method) then this method is also responsible for arranging that the StatusBase object returned by this method is notified when the device is ready to be read.

If there is no delay between triggering and being readable, then this method must return a StatusBase object which is already completed.

Returns

status (StatusBase) – StatusBase object which will be marked as complete when the device is ready to be read.

xpos()

Returns the detector’s xpos value.

ypos()

Returns the detector’s ypos value.

Attributes

channels

Returns a dictionary of all of the detector’s channels.

configuration_attrs

connected

hints

kind

needs_parent: list[type[OphydObject]] = [<class 'ophyd.signal.AttributeSignal'>, <class 'ophyd.signal.DerivedSignal'>, <class 'ophyd.areadetector.plugins.PluginBase'>, <class 'ophyd.pseudopos.PseudoSingle'>, <class 'pcdsdevices.signal.PVStateSignal'>]

stage_group: list[Component] = None

transmission

Returns the combined transmission value of the target and diode.