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

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

Future Plans for the DUNE Beam Group Laura Fields and Zarko Pavlovic 1 8 Feb 2018 Introduction This group has been on hiatus since August 2017 And is now under new leadership (welcome Zarko!) During the hiatus, a major beam design


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SLIDE 1

8 Feb 2018

Laura Fields and Zarko Pavlovic

Future Plans for the DUNE Beam Group

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SLIDE 2

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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SLIDE 3

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

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SLIDE 4

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
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SLIDE 5

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

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SLIDE 6

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

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SLIDE 7

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

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SLIDE 8

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)

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SLIDE 9

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

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SLIDE 10

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

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SLIDE 11

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

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SLIDE 12

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

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SLIDE 13

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)

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SLIDE 14

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

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SLIDE 15

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

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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…