particle beam optics laboratory (pbo lab) software introduction

04/19/23 G. H. Gillespie Associates, Inc. 1

Particle Beam Optics Laboratory Particle Beam Optics Laboratory (PBO Lab) Software Introduction(PBO Lab) Software Introduction

PBO LabTM


OverviewOverview

What is PBO Lab?How PBO Lab Works (for Users)Current PBO Lab ModulesAn Example of the Use of PBO LabSome of the Advanced ModulesSummary


What is PBO Lab?What is PBO Lab?

The Particle Beam Optics Laboratory is a modular set of applications to support the accelerator community in the areas of operation, beamline design, and training.

PBO Lab is built using the Multiple Platform Shell for Particle Accelerator Related Codes (SPARC-MP) framework (not discussed here)

C++ code, graphics libraries, physics codes


How & Why of PBO LabHow & Why of PBO Lab

Development Funded in Mid 1990’sThree DOE SBIR Contracts (94, 95, 96)

- PBO Lab Basic Package: Education

- TRANSPORT & TURTLE Originally

- More Modules (e.g. TRACE 3-D)

- Optimization Module Added:

2 Nonlinear Constrained Optimizers


New Advanced CapabilitiesNew Advanced Capabilities

Open Architecture Software Integration System (OASIS) for Particle Beam Optics

Phase II SBIR – finished in early 2008Automated Transfer Map Generator Using

Electromagnetic Field Solutions

Phase II SBIR – finish in 2009


A Little More About PBO LabA Little More About PBO Lab

PBO Lab provides a graphical “front end” “executor” and “back end” for optics codes

Front end includes a “drag & drop” graphical beamline construction kit - visual manifestation and manipulation of the underlying beamline object model

Executor runs the physics codesBack end includes graphical displays of

computed data and updates beamline model


Parts of the PBO Lab GUIParts of the PBO Lab GUI

Graphical Beamline Construction KitInteractive Tutorial System

- Two Parts: Slide Show and HypertextBuilt-in First-Order Optics Tools

- Integrated with Visual Display

(Bending & Focusing Tools)

- Useful for Qualitative Exploration


Graphical Beamline ConstructionGraphical Beamline Construction

“Document Window” Opens at Startup

Model Space

Work Space



Add Pieces to Build Beamline Model


PBO Lab “Beam Calculators”PBO Lab “Beam Calculators”

PBO Lab has several “smart units”Can be used to compute properties

- e.g. Momentum from mass & energyA 2nd Document Window useful

- on-screen beam physics calculatorThe “Work Space” can also be used



Pieces can be grouped into “Sublines”



The graphic model provides a visual representation of the object model


Parameters Set in Piece WindowsParameters Set in Piece Windows



Different parameter “sets” available,

for example bend Pieces offer:

- Bend Angle & Bend Radius

- Bend Angle & Trajectory Length

…

- Magnetic Field & Trajectory LengthDependent parameters “AutoCalc’d”



Units choices for each parameter- standard units (i.e. eV, keV, MeV, …)- “smart units” (i.e. , , p0, …)

“Green Dots” provide feedback - Indicate parameters that will be used for calculation with the optics

code displayed in “Context Switch”Several “Feedback Only” parameters


Context SwitchContext SwitchContext Switch Only Impacts Displays


Quadrupole Piece WindowQuadrupole Piece Window

Context Switch


Tutorial System – Slide Show PartTutorial System – Slide Show PartClick “Tutorial” Button in Quad Piece

Changing Parameters in Piece Window will Cause Slide Show Tutorial to Update


Tutorial System – HyperText PartTutorial System – HyperText Part


Use Copy & PasteUse Copy & Paste

Pieces May Be Cut, Copied & PastedWithin the Same Document, orFrom One Document to AnotherPiece Groups Cut, Copied, PastedGroups Retain their Structure Aliases with in Same Document

or in Multi-Document Mode (Buffer)


Quad Doublet with Copy & PasteQuad Doublet with Copy & Paste


Analysis and Graphics ToolsAnalysis and Graphics Tools

First Order Optics & Beamline View Focusing – Side View with Profiles Bending – Bird’s Eye View* Plot Tools Plots of Focusing Tool Data – Overlays Custom – User Defined Plots Data Interchange - Parameter Import/Export Text File Data – e.g. from a control system EPICS - Channel Access Function & Numerical Integration Tools


Focusing Tool – “Example B”Focusing Tool – “Example B”


Bending Tool – “SNL Implanter …”Bending Tool – “SNL Implanter …”


Optics Codes: How PBO Lab WorksOptics Codes: How PBO Lab Works

Optics code executions run from GUI -applied to Model Space object model

Object model also contains optics code specific instructions

PBO Lab writes input files, calls optics code to execute instructions, then displays requested outputs


How PBO Lab Works (for Users)How PBO Lab Works (for Users)


Current PBO Lab ModulesCurrent PBO Lab Modules

Basic Package – graphic construction kit, interactive tutorial, 1st order optics

Main Optics Code Modules:

TRANSPORT (FNAL/SLAC)

TURTLE (FNAL/SLAC)

MARYLIE (Univ. of Maryland)

TRACE 3-D (LANL)


Specialized Modules:

ElectroStatic Palette (TRACE 3-D)

TravelingWave Palette (TRACE 3-D)

DECAY-TURTLE (FNAL)Optimization Module (PBO Lab 2.2):

NPSOL (Stanford University)

MINOS (Stanford University)

Current PBO Lab ModulesCurrent PBO Lab Modules


New PBO Lab ModulesNew PBO Lab Modules

OASIS: Open Architecture Software Integration System – Custom Modules

New Modules Developed with OASIS

PARMILA 2 (LANL)

DIMAD (SLAC)

PSI – TRANSPORT

PSI – TURTLE


Example of Use (LLUMC)Example of Use (LLUMC)

Determination of beam parameters at the exit of the Loma Linda University Medical Center (LLUMC) proton therapy synchrotron

Utilized 2 Modules (+ Basic)

TRANSPORT Module

Optimization Module



Designing an advanced scanning capability for proton treatment requires detailed knowledge of extracted beam

More details of beam extracted from synchrotron needed, but no room in beamline for new diagnostics

Can the existing beam size monitors be used to determine the beam?



TRANSPORT to compute beam sizeSelect beam x, x’, y, y’, r12, r34 as

Optimization VariablesAdd Optimization Constraints on:

emittances, momentum spread, …Optimization Module fits TRANSPORT

beam sizes to measured sizes ()



( )mm

( )x cm ( )x' mr

-r 12

δ(%)0.0000 0.01500.00750.0

1.0

Optimizer Solution as a Function of Momentum Spread

( )mm( )x cm

( )x' mr

-r 12

ε(π- - )cm mrad0.00 0.060.03

0.0

1.0

Optimizer Solution Constrained by X Emittance

All initial conditions converged to the same solution

Sensitivity studies easy to perform


Example References (LLUMC)Example References (LLUMC)1. G. Coutrakon, J. Hubbard, P. Koss, E. Sanders, M. Panchal, “Beam Optics for a Scanned

Proton Beam at Loma Linda University Medical Center,” AIP Conf. Proc. 680, 1116-1120 (2002).

2. G. H. Gillespie, O. V. Voronkova, G. B. Coutrakon, J. A. Hubbard, E. Sanders, “Using the PBO Lab™ Optimization and TRANSPORT Modules to Gain an Improved Understanding of the LLUMC Proton Therapy Beamlines,” Proc. 2004 Euro. PAC, 2188-2190 (2004).

3. G. Coutrakon, J. Hubbard, E. Sanders and G. H. Gillespie, “Emittance Measurements for the LLUMC Proton Accelerator,“ Nuc. Instr. Meth. Phys. Res. B 241, 702-707 (2005).

4. G. H. Gillespie, B. W. Hill, G. B. Coutrakon, J. A. Hubbard, and E. Sanders, “Sensitivity Study for Evaluating the Extracted Beam Parameters of the LLUMC Proton Therapy Synchrotron,” Proc. 2005 PAC, 3046-3048 (2005).


From page 703 of reference 3 (preceding slide):

“In a previous publication, we adjusted the emittance parameters by “trial and error” using TRANSPORT until a good visual agreement with measured beam sizes was obtained. This was quite laborious and not as precise as the use of an objective function to minimize the difference between measured beam sizes and TRANSPORT calculations. The PBO Lab implementation of the NPSOL and MINOS optimizers can rapidly change the initial beam properties, and recalculate the beam size at selected points and then compare them to the measured values.”

From an earlier presentation of results at a PTCOG meeting:

“The beam transport optimizer from AccelSoft has shown great value in saving many days and even months in finding the best emittances for beam studies at the LLUMC proton accelerator facility.”

Why this Example (LLUMC)?Why this Example (LLUMC)?


Plans for Future EnhancementsPlans for Future Enhancements

More Modules Built with OASISATMG – “Quick and Easy” Transfer Maps

– From Computed Field Data

– From Measured Field Data Open to Suggestions!


SummarySummary

What is PBO Lab?Construction Kit, Tutorials, ToolsHow PBO Lab Works (for Users)Current PBO Lab ModulesAn Example of the Use of PBO LabAdvanced Modules & Future Plans


Contact InformationContact Information

Email

[email protected]

Phone

(858) 677-0133

particle beam optics laboratory (pbo lab) software introduction

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