Shot Engineering

1
Shot Engineering

• Accelerator Advisory Committee
• Elvin Harms
• Fermilab Beams Division
• 13 May 2002

2
Shot Engineering

• Introduction
• Planning Scheduling
• Statistics
• Shot Set Up
• Analysis/SDA
• Summary

3
Introduction

• Integrated Luminosity
• 31pb-1 since last meeting
• Peak Luminosity
• Dec 01 7.6 E30
• Now 19.6 E30
• Store Reliability
• 114 stores since 12/12/01
• 93 terminated intentionally 81

4
Planning Scheduling

• Collider Operation is our priority
• Up to 5 shifts per week for Collider studies
• Dedicated Tevatron
• Dedicated Pbar source
• Studies pbars to Tevatron
• Other machines as conditions permit
• Parasitic studies during remainder of week
• Recycler commissioning
• Protons and Pbars
• MiniBooNe beam commissioning
• Shutdowns as jobs accumulate or component failure

5
Operations Scheduling
Typical Schedule
6
Operations - Planning

• 0900 meetings Monday, Wednesday, Friday
• Review of performance
• Set short-term schedule
• Department meetings
• Topics of interest
• Studies de-briefing
• Studies planning
• Monday 1030 Studies Planning meeting
• Input from systems departments
• Integrate dedicated and parasitic studies
• Prepare schedule for next week
• Thursday meeting
• Run IIa topic
• Shot analysis

7
Statistics

• Store time
• Downtime
• Set-up time
• Compiled since last meeting
• 12 December 01 through 10 May 02

8
Statistics Store time

• On average, 71 hours in store per week, 42.5 of
  week
• Peak is 110 hours

9
Statistics - Downtime

• On average, 45 hours, 26 of time each week, is
  accrued as downtime
• On average, 8 of each week is downtime due to a
  failure
• On average, 8 of each week is downtime
  identified as a scheduled shutdown
• Experimenter-requested accesses are not
  considered shutdowns, usually miscellaneous
• Convening a reliability group

10
Statistics Set-Up time

• Three hour shot set-ups are the average
• Two-hour set-ups recently
• 1-1/2 hours has been achieved and should be
  routine
• Identifying slow steps
• Refining set-up technique
• Identify a realistic short-term goal

11
Shot Set-Up

• Description
• Tools
• Recent Progress and Improvements

12
Shot Set-Up Description
Proton source
Antiproton source
Tevatron
Main Injector Recycler
13
Shot Set-Up Description
Tevatron Main Injector Pbar source
Terminate store Return to 150 GeV Check/correct closed orbit Cool Pbars into core maintain stability
Verify/correct A150 line tune Set tunes chromaticities Check/correct extraction positions Optimize protons Accept reverse protons, maximize transmission from MI, minimize injection oscillations
Load protons Provide protons for tuneup of beam lines Orient Accumulator for unstacking
14
Shot Set-Up Description
Proton source
Tevatron
Antiproton source
AP3
AP1
MI-8
A1
P2
Main Injector Recycler
P1
15
Shot Set-Up Tools

• Manpower
• MCR crews are fully integrated
• Cross-training continues
• Machine experts present much of the time for
  dedicated tasks and monitoring
• Software
• Sequencers
• State devices
• Specialized applications

16
Shot Set-Up Recent Progress

• Improved Accumulator to MI beam lines lattice
  match
• Revised Unstacking Scheme
• Pbar transfers to both Tevatron and Recycler in
  same shot set-up
• Tevatron tunes and chromaticity setting at 150
  GeV
• MI coalescing improvements

17
Shot Set-Up Improvements

• Decrease turn-around time
• Track length of setup steps
• Identify steps of concern
• Apply fixes
• Ongoing exercise
• Beam line tuning reproducibility
• Tevatron octupole tune-up
• Proton pulse to pulse stability
• Pbars requested vs. unstacked
• Optimization of input parameters
• MCR specification sheet
• Close the loop
• Use previous stores to improve on future ones
• SDA

18
Shot Analysis/SDA

• Introduction
• Data
• Status

19
Shot Analysis/SDA - Introduction

• SDA The Shot Data Analysis (SDA) products are a
  set of complementary tools and application
  libraries intended for off-line studies of the
  Tevatron complex performance during RunII. Beam
  Physicists and Engineers can access the shot data
  from their workstations, using either a
  collection of Java-Based or Web based
  applications to plot and export flat data table
  (ASCII text) to other packages for further
  studies. We believe that this remote access and
  analysis of the beam data will be essential
  optimize and fine-tune our accelerators for
  RunII. This can only be accomplished via
  extensive studies of post-mortem dumps of the
  data, trending over significant periods,
  selection of particularly successful stores and
  so forth.

20
Shot Analysis/SDA - Introduction

• SDA Main Tools
• SDA Editor to add, edit, delete input devices
• Devices can be sampled over time to generate time
  plot data
• Devices can be sampled on single event to
  generate scalar data
• SDA Viewer to view scalar data information
• Given most attention to date
• Plot Viewer to view plottable data
• Needs more attention
• Off-line Analysis tools
• data saved into Shots and Tevatron electronic
  log books
• true off-line tools under development

21
Shot Analysis/SDA Scalar Data
Sample Scalar data view for Pbars
22
Shot Analysis/SDA Summary Report
23
Shot Analysis/SDA Plots
Protons 10 recent stores
Pbars 10 recent stores
24
Shot Analysis/SDA - Status

• Recent influx of manpower
• Bi-weekly infrastructure meetings/action list
• Generating useful data, but not complete
• Software platform stabilizing
• Hardware fairly stable
• Analysis in progress/just beginning
• Instrumentation needs work in some areas
• Need to build a larger user base

25
Shot Engineering - Summary

• Luminosity performance is improving
• Planning/scheduling
• Mature
• Flexibility is needed
• Reliability
• Good
• Needs proactive attention
• Shot Set-Up
• Technique is mature
• Evolving as necessary
• Needs to go faster
• Shot analysis
• Toddler stage
• Tools maturing
• Getting serious about analysis