FMB Oxford DCM, CalibrationUnits, P01, P02, Tango

The following lines of code create a FMB widget including the calibration constants. A figure of the widget is displayed below.

 
#
# part of /online_dir/TkIrc.pl
#
$Spc::res_h{ blsc} = "fmb";

$Spc::res_h{ fmb_title} = { text => "FMB DC Monochromator"};
$Spc::res_h{ fmb_help} = sub 
{ 
    Util::display_text( "Help MC", 
'
  Some Help text
'
)};

$Spc::res_h{ fmb_cmpnd} = { name => "energyfmb", unit => "eV"};

#
# the motors
#
$Spc::res_h{ fmb_m1} = { name => "Dcm_Bragg", unit => "Deg"};
$Spc::res_h{ fmb_m2} = { name => "Dcm_Parallel", unit => "mm"};
$Spc::res_h{ fmb_m3} = { name => "Dcm_Perp", unit => "mm"};
#
# the calibration units
#
$Spc::res_h{ fmb_io1} = { 
    label => { 
	name => "CalBragg", 
	get => sub { sprintf( "%g", Spectra::tng_attrDoubleRd( "dcm_bragg", "UnitCalibration"));},
	unit => "Deg"},
    entry => { 
	set => sub { Spectra::tng_attrDoubleWrt( "dcm_bragg", "UnitCalibration", $_[0])}}};
$Spc::res_h{ fmb_io2} = { 
    label => { 
	name => "CalParallel", 
	get => sub { sprintf( "%g", Spectra::tng_attrDoubleRd( "dcm_parallel", "UnitCalibration"));},
	unit => "mm"},
    entry => { 
	set => sub { Spectra::tng_attrDoubleWrt( "dcm_parallel", "UnitCalibration", $_[0])}}};
$Spc::res_h{ fmb_io3} = { 
    label => { 
	name => "CalPerp", 
	get => sub { sprintf( "%g", Spectra::tng_attrDoubleRd( "dcm_perp", "UnitCalibration"));},
	unit => "mm"},
    entry => { 
	set => sub { Spectra::tng_attrDoubleWrt( "dcm_perp", "UnitCalibration", $_[0])}}};

Figure 14.13: BLSC: FMB, P01

The 'Test' button works as follows. A value is inserted in the fmbenergy entry widget. If 'Test' is pressed, the target positions of the axes are displayed in the log window of the toplevel widget.

Calibration: the FMB is calibrated by supplying a value to the fmbenergy entry widget, followed by an 'Options' - 'Calibrate' action. Calibrations change the axes offsets. Consider to take a note of the old offsets before a new calibration is done.

The FMB uses 4 motors (3 axes and the fmbenery) that need to be defined in /online_dir/online.xml:

...
<device>
 <name>energyfmb</name>
 <type>type_tango</type>
 <module>motor_tango</module>
 <device>pXX/dcmener/oh.01</device>
 <control>tango</control>
 <hostname>hasppXXoh1:10000</hostname>
</device>

<device>
 <name>dcm_bragg</name>
 <type>type_tango</type>
 <module>motor_tango</module>
 <device>pXX/dcmmotor/oh.01</device>
 <control>tango</control>
 <hostname>hasppXXoh1:10000</hostname>
</device>

<device>
 <name>dcm_parallel</name>
 <type>type_tango</type>
 <module>motor_tango</module>
 <device>pXX/dcmmotor/oh.04</device>
 <control>tango</control>
 <hostname>hasppXXoh1:10000</hostname>
</device>

<device>
 <name>dcm_perp</name>
 <type>type_tango</type>
 <module>motor_tango</module>
 <device>pXX/dcmmotor/oh.03</device>
 <control>tango</control>
 <hostname>hasppXXoh1:10000</hostname>
</device>
...