BL8.0.1.1 iRIXS Operation Manual (Rev 3.0)

iRIXS & htRIXS design: Qiao et al., Review of Scientific Instruments 88, 033106 (2017); doi:10.1063/1.4977592 (PDF)

iRIXS hrRIXS design: Chuang et al., Review of Scientific Instruments 88, 013110 (2017); doi: 10.1063/1.4974356 (PDF)

mapping of RIXS (mRIXS) data process guideline: Wu et al., J. Vis. Exp. (134), e57415 (2018); doi: 10.3791/57415 (PDF)

iRIXSiRIXS schematic

A downloadable PDF version of the Rev 3.0 iRIXS manual is available here!

For returning users: Click here for quick reminders on A Routine Procedure to Start RIXS experiments in iRXIS” & Important end-of-run operations.

For most users: Click here for software interface explaination.


Beamline mirrors and sample positions for iRIXS (typical, numbers change!)

V11 mirror:

H1 switch yard horizontal mirror:

[Example!] Sample positions of both spectrographs:
Note: This is for a Carbon Tape, Upper Stage, Center of sample holder


iRIXS component locations and definitions

iRIXS endstation
Figure 1: Corresponding motors shown in the iRIXS BCS main control Labview interface.


Sample transfer:

Check out video demonstrations of sample transfer:


iRIXS Sample Transfer

Note: Do NOT take away the sample holder from beamline after your experiments!
Note: Do not over-tighten(close) the transfer arm collets
Note: Sample holders are of 1 inch diameter, but leave about 2mm edge area for the grabber collets.  See image: attach samples ONLY to the black area or on the round plate if used.

iRIXS Sample Holder



Reference samples on iRIXS manipulator:

iRIXS reference Samples
Update: Fe3O4 is replaced by Au & CdS films as ofApril 2016


A Routine Procedure to Start RIXS experiments in iRXIS:

NOTE: The CCD arm & grating angles determine the energy window & peak position.


Important End-of-run Operations!!

Below is the operation parameters (check the values in purple):

(NOTE: If you don’t know which spectrograph you are using, you are using the hrRIXS!)

High-resolution RIXS (hr-RIXS) spectrograph

Note: 0th order peak width adjustment is recommended for the very 1st sample.  But just maximizing the signal intensity is also good enough.

1st order measurement positions:


0th order alignment positions (centered on CCD):

Note: A focused 0th order peak width is about 4-5 pixels, with curvature adjustment.


High-throughput RIXS (ht-RIXS) spectrograph
(do NOT touch any spectrometer strut!)

Low Energy Optics:
LEG LVDT reading: 40000-54400  (manual adjustment, Figure 2)
LEM LVDT reading: 33400 (Do NOT change! Experienced user ONLY)
0th order: CCD Arm Angle (angle meter): about 24 degree
1st order: CCD Arm Angle (angle meter): about 20.8 degree
[Just an Example!] CCD arm all the way down Dialer at ~1.9” LEG=54400 for Si-L edges; LEG=40000 for ~140 eV.

High Energy Optics:
HEG LVDT reading: 27500 (manual adjustment, Figure 2)
HEM LVDT reading: 20000 (Do NOT change! Experienced user ONLY)
1st order:  CCD arm angle (angle meter): about 21 degree
0th order: CCD arm angle (angle miter): about 22.8 degree
                    (CCD arm Dialer 0.406”; 0th order peak centered around # 1034.7 pixel)
[Just an Example!] CCD arm Dialer at ~1.26”, HEG=27580, O-K to Ni-L in the same energy window.

Once see signal peak on CCD, move Y-axis slowly to optimize the intensity/sharpness of elastic peak and/or signals!


Spectrograph Operation Software

Update: As of “May the Fourth (be with you)”, Labview software package is implemented for general users.
The Andor Solis camera software from Andor is for troubleshooting only

(for users) The ALS Labview software, fully optimized and integrated with BCS!

Operation Procedures of the ALS Labview control software:

iRIXS main interface

iRIXS subsystem

iRIXS CCD cooling

iRIXS scan setup

Note: Try not to turn on the CCD until the temperature is low, except for occasional checking. If the CCD shows high background when it is cooled down, it may need to be warm up and cooled down again.

iRIXS CCD parameters


High-throughput RIXS (ht-RIXS) spectrograph

Note: For a general user, the ONLY use of the LVDT software below is to watch the grating angles (Channel 3), which is needed ONLY for switching between low-E and high-E.


Note: In order to display the LVDT readings on the main VPB panel, motor motion has to be stopped by clicking the lightning button again!


The un-motorized items of ht-RIXS as of 2/22/2016:

iRIXS htRIXS manual adjustments

Figure 2: Manual adjustments of the optics in ht-RIXS spectrograph

iRIXS htRIXS dailer

As of 2016/03/02, the CCD arm rotation of htRIXS spectrograph is operated through the hand drill, and the dial indicator touching the bottom of the Dialer (see image above)
Important NOTE: No-body touches the dial indicator! Otherwise, all the numbers for the focusing position bellow needs to be recalibrated and reset!



Guideline of RIXS data processing into full energy range mapping of RIXS (mRIXS):