NIAC2006: Synchrotron Group
From NeXus
Contents |
Nexus – Synchrotron breakout group
These are notes from our first discussion on 2006-02-01
present : AG (ESRF), RW (ESRF), PJ (APS), CM (Soleil), SP (Soleil), SC (Diamond), LL (CCLRC,RAL)
RW – ESRF has their own format but willing to adopt
PJ – need an international collaborative effort, EPICS low level
SP – Soleil has adopted Nexus, need tools, developed a tango generic system store data in Nexus, NO DATA to store yet, need to start quickly to store data, do not need a complete DTD
SC – committed to Nexus, MX beamlines will store imageCIF, prefer to store data in Nexus in the long term, EPICS low level simulators, simple classes to start with
LL – working on catalogue information, TOF meta-data definition, data portal to access different type of data for modelled and measured data
PJ – basic questions about which class contains which ?
PROPOSED CLASSES
- COMMON
- source
- insertion device
- bending magnet
- INSTRUMENTS
- tomography
- pin hole saxs
- exafs
- powder diffraction
- single crystal diffraction
- protein crystallography
- BEAMLINE COMPONENTS
- bpm
- goniometer
- DETECTORS
- ccd
- psd
- ionisation chamber
- opaque data (image plates, other large data slugs)
NXsource additions
| Name | Type | Description |
|---|---|---|
| mode | NX_CHAR | synchrotron mode e.g. single bunch, multi bunch... |
| top_up | NX_BOOLEAN | flag indicating top-up mode |
NXsource is more like NXfacility for us
NXinsertion_device
| Name | Type | Description | |
|---|---|---|---|
| name | NX_CHAR | name of insertion device (ID33, UD02) | |
| type | NX_CHAR | undulator, wiggler, ... | |
| gap | NX_FLOAT | gap in mm | |
| taper | NX_FLOAT | taper in mm | |
| phase | NX_FLOAT | phase in degrees | |
| poles | NX_INT | number of poles | |
| length | NX_FLOAT | length of insertion device | |
| power | NX_FLOAT | total power delivered by insertion device | |
| energy | NX_FLOAT | energy of peak | |
| bandwidth | NX_FLOAT | bandwidth of peak energy | |
| harmonic | NX_INT | harmonic of peak | |
| spectrum | NXdata | spectrum of insertion device | |
| geometry | NXgeometry | position, orientation of insertion device |
NXbending_magnet
| Name | Type | Description | |
|---|---|---|---|
| name | NX_CHAR | name of bending magnet | |
| critical energy | NX_FLOAT | critical energy | |
| bending radius | NX_FLOAT | ||
| spectrum | NXdata | spectrum of insertion device | |
| geometry | NXgeometry | position, orientation of insertion device |
Questions
- Can we have NX_BOOLEAN ?
- Do we have to use microamp units for current ?
- Why is NXmonitor not NXdata ?
IDEAS
NXbeam_position_monitor could be a separate class (subclass of NXlog) ?
