Abstract: A vapor conduit for use in an apparatus for bulk vapor phase crystal growth, an apparatus for bulk vapor phase crystal growth, and a process for bulk vapor phase crystal growth are described. The vapor conduit is a flow conduit defining a passage means adapted for transport of vapor from a source volume to a growth volume, wherein a flow restrictor is provided in the passage means between the source volume and the growth volume and wherein the flow conduit further comprises a flow director structured to direct vapor flow downstream of the flow restrictor away from a longitudinal center line of the conduit and for example towards an edge of the conduit.

Abstract: A method of calibration of a dataset for spectroscopically resolved radiation scanning, comprising the steps of: generating an apparatus condition specific calibration dataset of emergent radiation intensity information generated after interaction in the scanning zone of at least one standard object spectroscopically resolved into a plurality of frequency bands; providing a transferable database comprising a dataset of transferable data items of emergent intensity information for a range of component materials, each spectroscopically resolved into a plurality of frequency bands and linked to the condition specific calibration dataset; defining a reference calibration dataset; generating a transfer function between the data item and the reference calibration dataset; applying the transfer function to the transferable data item to generate a dynamic data item adjusted to the reference calibration; populating a data register with a dynamic dataset comprising a dataset of data items each dynamically adjusted to t

Abstract: A vapour conduit for use in an apparatus for bulk vapour phase crystal growth, an apparatus for bulk vapour phase crystal growth, and a process for bulk vapour phase crystal growth are described. The vapour conduit is a flow conduit defining a passage means adapted for transport of vapour from a source volume to a growth volume, wherein a flow restrictor is provided in the passage means between the source volume and the growth volume and wherein the flow conduit further comprises a flow director structured to direct vapour flow downstream of the flow restrictor away from a longitudinal centre line of the conduit and for example towards an edge of the conduit.

Abstract: A method of calibration of a dataset for spectroscopically resolved radiation scanning, comprising the steps of: generating an apparatus condition specific calibration dataset of emergent radiation intensity information generated after interaction in the scanning zone of at least one standard object spectroscopically resolved into a plurality of frequency bands; providing a transferable database comprising a dataset of transferable data items of emergent intensity information for a range of component materials, each spectroscopically resolved into a plurality of frequency bands and linked to the condition specific calibration dataset; defining a reference calibration dataset; generating a transfer function between the data item and the reference calibration dataset; applying the transfer function to the transferable data item to generate a dynamic data item adjusted to the reference calibration; populating a data register with a dynamic dataset comprising a dataset of data items each dynamically adjusted to t