1. Java replacement for Windows Interface to Simulation of Errors
Geometric misalignments
Noé Fernández Álvarez
27/01/2017

2. Summary Introduction to WISE geometric WISE calculations WISE usage
WISE’s output
Conclusions
WISE examples and results

3. Introduction o WISE geo
WISE is composed by two main modules
Magnetic errors
Geometric errors
It’s the new version of the software written in Excel by P. Hagen
Purpose: Calculate the misalignments of the magnets inside the tunnel
Provides the most recent data for the misalignments

4. Misalgniments = dcryo + dmag
Position of the magnets inside the cryostat was measured after the assembly process
The cryostat is not perfectly aligned and it moves in time
The best estimation of the position for each magnet is the offset of the magnet + offset the cryostat
The error vector is D(i) = Dm(i) + Dc(i)

5. WISE Calculations: Conventions
Coordinate system
Structure of the magnets
Entry and exit point of each magnets is measured
The entry point is .E (entrée) The exit point is .S (sortie)

6. WISE Calculations: Components
Coordinate system
dr = radial difference
dl = longitudinal difference
dv = vertical difference
dt = tilt difference
Keep the previous images to make it clear

7. WISE Calculations: Output data
Δx = avg (dRe ,dRs) mean offset for the radial component
Δy = avg (dVe, dVs) mean offset for the vertical component
Δs = avg (dLe,dLs) mean offset for the longitudinal component
ΔΨ = avg(dTe, dTs) mean offset for the tilt
ΔΘ = (dRs – dRe)/magnetic length rotation around x-axis
ΔΦ= (dVs - dVe)/magnetic length rotation around y-axis
S = Position of the magnet inside the tunnel
Name = magnet name
Picture with the direction of the offsets

8. WISE usage
WISE is released on the afs directory /afs/cern.ch/eng/lhc_online_model/pro/WISE
It only needs one argument: path to the XML configuration file
This configuration file is shared both by the geometric and the magnetic modules
The XML configuration file allows to configure different aspects of the calculations and add filters to the data we want
Example usage: sh WISE.sh /path/to/my/configuration.xml
To run the geometric part, the option MAGNETSGEOMETRY must be present in the ErrorSources element

9. WISE usage: XML configuration example

10. WISE usage: Available XML options
MagnetsType: Select the magnets we want to use (i.e.: MB, MBRB, MQ,…). By default it takes all of them
Beam: Select the magnets corresponding to the selected beam
Sector: Select the magnets by sector
Uncertainty: Enables/disables the usage of deterministic errors. Options: true/false
Full details for each parameter can be found HERE

11. WISE usage: Available XML options
OutputName: Name for the output file
PathToSaveOuputs: Defines the path to save the results
ErrorSources: Defines which calculations must the program run
MAGNETSGEOMETRY: Required to run the geometric part, generates the alignment errors produced due to imperfections in the shape of magnets
TUNNELMOVEMENTS: Generates the alignment errors due to the cryostat position in the tunnel and it’s movements over the time
Put the address on the here word
Full details for each parameter can be found HERE

12. WISE’s output
The output of the program for the geometric part depends on the ErrorSources parameter
MAGNETSGEOMETRY: Generates the misalignments for the magnets
TUNNELMOVEMENTS: Includes the errors produced by the movements on the cryostats
A 6-component vector is produced for each option
The components for MAGNETSGEOMETRY starts with M_ (M_DX, M_DY,…)
The components for TUNNELMOVEMENTS starts with MA_ (MA_DX, MA_DY…)
Simplify the text

13. Output example TFS file with the errors
Say that it can be loaded to MADX
Say the command EALIGN

14. WISE’s output
The output of the program is a TFS table with the chosen data
It can be used in MADX thru the EALIGN command

15. Conclusions
This tool fully replaces the old Excel geometric simulation software
Can be run in any computer at CERN

16. WISE Examples 3 Examples are located in the afs
/afs/cern.ch/eng/lhc_online_model/dev/WISE/geo-examples
Example 1: Runs WISE extracting the misalignments for the magnets
Example 2: Runs WISE extracting the misalignments both for magnets and cryostats
Example 3: Runs WISE extracting the misalignments for the magnets and applying filters to the execution

17. WISE results
WISE versions comparison : Web to compare the data from both versions of WISE

18. WISE results
Dx component - magnets

19. WISE results
Dy component - magnets

20. WISE results
Ds component - magnets

21. WISE results
Tilt component - magnets

22. WISE results
Theta component - magnets

23. WISE results
Phi component - magnets

24. WISE results
Dx component - Cryostats

25. WISE results
Dy component - Cryostats

26. WISE results
Ds component - Cryostats

27. WISE results
Tilt component - Cryostats

28. WISE results
Theta component - Cryostats

29. WISE results
phi component - Cryostats