# Presentation: 658509

## Shot Engineering

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

## Shot Engineering

- Introduction
- Planning & Scheduling
- Statistics
- Shot Set Up
- Analysis/SDA
- Summary

- 13 May 02

## 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%

- 13 May 02

## 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**

- 13 May 02

## Operations – Scheduling

- Typical Schedule

- 13 May 02

## 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

- 13 May 02

## Statistics

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

- 13 May 02

## Statistics – Store time

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

- 13 May 02

## 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**

- 13 May 02

## 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**

- 13 May 02

## Shot Set-Up

**Description**
**Tools**
**Recent Progress and Improvements**

- 13 May 02

## Shot Set-Up – Description

**Tevatron**

**Proton source**

**Main Injector**
**Recycler**

**Antiproton source**

- 13 May 02

## 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 |

- 13 May 02

## Shot Set-Up – Description

**Tevatron**

**Proton source**

**Main Injector**
**Recycler**

**Antiproton source**

- AP3

- P2

- P1

- AP1

- A1

- MI-8

- 13 May 02

## 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

- 13 May 02

## 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**

- 13 May 02

## 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

- 13 May 02

## Shot Analysis/SDA

**Introduction**
**Data**
**Status**

- 13 May 02

## 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.

- 13 May 02

## 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

- 13 May 02

## Shot Analysis/SDA – Scalar Data

- Sample Scalar data view for Pbars

- 13 May 02

## Shot Analysis/SDA – Summary Report

- 13 May 02

## Shot Analysis/SDA – Plots

- Protons – 10 recent stores

- Pbars – 10 recent stores

- 13 May 02

## 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**

- 13 May 02

## 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

- 13 May 02