Future Plans for the DUNE Beam Group Laura Fields and Zarko Pavlovic - - PowerPoint PPT Presentation

8 Feb 2018

Laura Fields and Zarko Pavlovic

Future Plans for the DUNE Beam Group

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BIWG Plans 8 Feb 2018

• This group has been on hiatus since August 2017
• And is now under new leadership (welcome Zarko!)
• During the hiatus, a major beam design choice was made
• Optimized beam will go forward to preliminary design
• This talk reviews some of the beam-related work going on now (or that

is planned soon)

• In many cases, work will only get done if people are available to do it
• Let us know if you are interested in any of this
• Or if there are things not mentioned here that should be on our radar

Introduction

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BIWG Plans 8 Feb 2018

Supporting LBNF Beamline Design

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• Historically, one of the most important roles for this group has been

studying the physics impact of changes to the beamline design

You just heard about LBNF status/plans from Vaia This work will continue to be a central focus

• f our work going forward; this is a good

place for new collaborators to get involved

BIWG Plans 8 Feb 2018

Supporting DUNE Physics Groups

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• This group also provides the starting

point (neutrino flux predictions) for all accelerator-based physics studies

• Needs of the LBL/far detector groups

have historically been pretty simple

• Mainly they just want a flux
• We should generate a large sample of the

current design and encourage them to use it

• More complex requests have come

from the near detector group

• Detailed info on beam systematics
• Fluxes at off-axis angles

BIWG Plans 8 Feb 2018

A Recent (and Periodic) Request from Physics Groups

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From CD1-R CDR

• Tau neutrinos are present via oscillations

at the far detector

• There are also some intrinsic tau

neutrinos in the beam, arising from charm production in the target

• We periodically get requests for

estimates of this flux

• These are not present in our simulation
• G4 (and MARS) don’t produce charm
• Options
• Combining Pythia with G4
• Using Fluka (which does produce

charm)

• Not high priority, but would be a useful

contribution if anyone is interested

BIWG Plans 8 Feb 2018

Public Plots / Preparing for TDR

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• Since we have a beam design that is

unlikely to change dramatically in the near future, it is a good time to update

• ur public plots
• I think we should develop a suite of

plots that describe details of our flux, with information commonly requested

• Fluxes at both detectors vs neutrino

flavor

• Divided by neutrino ancestor?
• Flux uncertainties
• Alternate (ME and HE)

configurations?

• This also prepares for our

contribution to the TDR (due in 2019) From CD1-R CDR

BIWG Plans 8 Feb 2018

Systematic Uncertainties

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• We produced our first complete estimate of

DUNE flux uncertainties in 2016 for the ND task force

• It is time to update those uncertainties to reflect

the new beam design

• Also needed by LBNF team setting tolerances
• The near detector group has also asked for

additional information

• Uncertainties on ratio of muon neutrino and

electron neutrinos

• Uncertainties vs neutrino angle
• Uncertainties at various off axis angles
• Some of this work is already underway in the ND

group

• Will arrange a talk from them soon
• A. Bashyal (OSU) working on hadron production

— expect updates from him too

BIWG Plans 8 Feb 2018

New Hadron Production Measurements

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• Measurements are being made at NA61

that will further improve our flux uncertainties

• An important contribution we should

make: what hadron production measurements are most needed for DUNE?

• DUNE Flux spectrometer concept

introduces possibility of building a hadron production program at Fermilab beyond NA61

• This work has a leadership (and effort)

vacuum with the departure of Paul Lebrun)

BIWG Plans 8 Feb 2018

Muon Monitors

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• There is ongoing effort to design Muon monitors
• Expect an update on status of this

work soon

BIWG Plans 8 Feb 2018

Learning From NuMI

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• There are several ongoing efforts for NuMI that this group should be

aware of: from Katsuya Yonehara

• One is a renewed effort to analyze

data from the NuMI muon monitors

• Started by Katsuya Yonehara
• being picked up by Tyler Rehak
• Also continuing muon monitor

simulation most recently done at Colorado

• Expect some updates from Tyler

here

BIWG Plans 8 Feb 2018

Learning From NuMI

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• There are several ongoing efforts for NuMI that this group should be

aware of: from Jim Hylen

• Another is ongoing investigations of

a reconstructed energy spectrum mismodeling seen by MINERvA and MINOS+

• Consistent with a mismodeling of

focusing system (e.g. large longitudinal shift in target or horn current)

• Next steps: measurements of horn

magnetic field in current equalization section

BIWG Plans 8 Feb 2018

New Electromagnetic Simulations

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• Based in part on the ongoing NuMI investigations, there is also a plan

to do detailed electromagnetic simulations of the horn magnetic fields

• Our current simulation assumes a simple 1/r falloff of field, does not include

details such as current asymmetry and fringe fields

• Studying the effect of a new field map will be a high priority for this group

when it is available

BIWG Plans 8 Feb 2018

Long Term Physics Goals

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• It is also important that we consider long-term uses of the LBNF

beamline

• Raja Fellow Jogesh Rout is at

Fermilab for the next ~3 months studying beam optimization for long- term physics goals

• Important to maintain optimization

infrastructure to support LBNF design work

• Mary B. has proposed an alternative

to DUNEPrism using different beam configurations (instead of off-axis angles)

BIWG Plans 8 Feb 2018

Miscellaneous

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• Other smaller but important tasks:
• Code cleanup:
• G4LBNF has grown into a large beast, to accommodate a lot of design

ideas

• Paul Lebrun (the main author of G4LBNF) strongly recommends a major
• verhaul
• Documentation/Tutorials
• Most of this was written by me years ago, and could use a refresh
• If you are a new person following these tutorials, feel free to fix them as

you find outdated information

BIWG Plans 8 Feb 2018

• Even though the large beam optimization effort is complete and beam

design work is at a lull currently, there is lots of work to do

• Let me and Zarko know you are interested in getting involved
• Or if you think there are other things that we’ve missed in this talk

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Conclusion

BIWG Plans 8 Feb 2018

• Paul Lebrun has a been a

critical part of the beam design and simulation effort for many years

• He is retiring tomorrow
• There will be a farewell party

soon — details will be sent to mailing list

• Thank you Paul, for everything

you have done

• I really don’t know what we are

going to do without you!

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And Finally…