# Presentation: 512858

## Run II Status and the FY04 Plan

- DOE Review
- February 24, 2004
- Dave McGinnis

## Outline

- FY04 Goals
- Accomplishments during the Fall 2003 Shutdown
- FY04 Design Parameters
- Machine Issues
- FY04 Performance
- Operations Strategy
- Study Strategy
- FY04 Lessons
- Summary

## FY04 Goals

## Major FY04 Goals

- Operate the Collider at the Main Injector project luminosity design goals
- 80% Antiproton transform efficiency from the Accumulator to Low Beta
- 260x109 protons per bunch
- 18x1010/hour antiproton zero stack stacking rate
- Integrate over 300pb-1 in 39 weeks
- Prepare the Collider for implementation of the initial stages of the Run II Upgrades
- Slip Stacking
- AP2-Debuncher Aperture
- Commission the Recycler for electron cooling

## Accomplishments during the Fall 2003 Shutdown

## Major Accomplishments of the Fall 2003 Shutdown

- Proton Source
- Installation of the new dogleg magnets in one of the extraction regions
- Installation of large aperture magnets in the beginning of the transfer line from Booster to Main Injector
- Installation of the Booster Collimation System
- Antiproton Source
- Installation of the motorized Debuncher Quad Stands
- Installation of the Debuncher BPM System
- Survey and alignment of the AP2 line
- Installation of the new equalizers for the Debuncher momentum cooling BAW notch filters
- Main Injector
- Installation of the NUMI extraction Lambertsons and transfer line
- Instrumentation relocation for NUMI

## Major Accomplishments of the Fall 2003 Shutdown

- TEVATRON
- Installation of a ring–wide laser tracker alignment network
- Complete survey of all TEV magnets
- Un-roll dipoles with rolls > 1 mrad
- Rolls over 4 mrad had to be done warm – 100% complete
- Rolls under 4 mrad can be done cold – 60 - 70% complete
- Re-alignment of the several devices for aperture increase
- Alignment of the D0 triplet
- Smart bolt retrofit
- Remove sag in magnets that can cause coupling
- Done in B & D sectors because of the lack of skew correctors in this region
- Replacement of  ~50 aging magnet stand pairs

## Major Accomplishments of the Fall 2003 Shutdown

- TEVATRON (continued)
- Shielding of the F0 Lamberston laminations to reduce the transverse impedance of the TEVATRON
- Re-wiring of the octupole circuits
- Differential chromaticity between pbar and proton helices
- Increase Landau damping
- New sextupole circuit for decoupling injection helical orbits
- Recycler
- Complete ring-wide bake
- Replaced 170 ft of contaminated vacuum pipe
- Upgraded vacuum instrumentation
- Finished the ion pump upgrade
- Additional magnetic shielding added

## FY04 Design Parameters

## FY04 Design Store Parameters

## FY04 Design TEVATRON Parameters

## FY04 Design TEVATRON Parameters

- F0 Lambertson

- TEV Injection Matching

- TEV Helices

- MI Long. Dampers & Beam Loading

- TEV Chromaticity control

- TEV Injection Coupling

## FY04 Design Antiproton Parameters

## FY04 Design Antiproton Parameters

- Recycler Pbar Tax

- Debuncher filters

- Stacktail filters

- Debuncher Quad Stands

- MI Long. Dampers & Beam Loading

- Stacktail phase crossover

## Projected FY04 Integrated Luminosity per Week

- Design

- Base

## Projected FY04 Peak Luminosity

- Design

- Base

## Machine Issues

## Machine Issues

- Linac
- Availability of low energy Linac RF Power tube
- Exploring alternatives with vendor and Brookhaven – See P. Czarapata’s talk
- Klystron spare viability
- Linac Klystron task force led by R. Pasquinelli
- Booster
- Radiation damage due to the proton demands of the neutrino program.
- Booster Collimators installed
- _Rapid Response Team_ has been assigned to commission the collimators
- Commissioning cogging (needed for slip-stacking and NUMI)
- Injection matching of the 400 MeV line
- Preliminary stages of developing a proton plan
- Pulse component upgrade
- Aperture upgrade (RF stations and kickers)
- Alignment upgrade (TEV style alignment network)
- Closed orbit control (ramped magnets and power supplies)
- Tune control

## Machine Issues

- Pbar
- Stacking cycle time
- Debuncher Momentum cooling OPTICAL notch filters
- Stacktail notch filter bandwidth increase
- Stacktail phase crossover
- Pbar production
- Debuncher – AP2 Beam based alignment
- Debuncher Quad stands, Debuncher BPM system, and Debuncher quad shunts are installed
- AP2 trims, AP2 quad shunts, and Debuncher turn-by-turn installed.
- Debuncher bunch rotation orbit
- Main Injector to Debuncher phase alignment system commissioned
- 8 GeV energy Alignment
- Main Injector to Debuncher phase alignment system commissioned
- Extraction emittance
- Longitudinal - Commissioning of 2.5 MHz transfers
- Transverse – Redesign of the core cooling equalizers to eliminate band overlap

## Debuncher Momentum Cooling Notch Filters

- Initial pass on Debuncher notch filters disappointing
- Building optical notch filters
- Factor of 3-4 better than Bulk Acoustic Wave filters
- More difficult to implement than BAW filters
- Ready now and to be installed in the March ’04 mini-shutdown

- Bulk Acoustic Wave filters

- Optical filters

## Machine Issues

- Main Injector
- Bunch length on the Pbar target
- Beam loading compensation
- Longitudinal dampers
- Antiproton coalescing efficiency
- Accumulator transfers - Commissioning of 2.5 MHz transfers
- Recycler transfers – Commissioning of 2.5 MHz acceleration
- Slip Stacking
- Mechanics are working
- Bunch length on target
- Beam loading compensation
- Longitudinal dampers
- Running the Fixed target program
- Commissioning of high intensity NUMI multi-batch cycles
- Transverse and longitudinal dampers
- Switchyard 120 – Rapid Response Team has just finished commissioning slow spill
- 8 GeV Energy alignment
- Main Injector to Debuncher phase alignment system commissioned

## Machine Issues

- TEVATRON
- Emittance Dilution at injection
- Injection lattice in the TEV
- First pass complete
- Further optimizations to be made
- Vertical Dispersion match from P1 transfer line
- To be corrected with roll of P1 quadrupoles (to be done in March ’04 shutdown)
- Coupling corrections
- Smart bolt retrofit
- Done during shutdown
- Further coupling adjustments to be made
- New sextupole for decoupling injection helices
- Pbar Injection dampers

## Machine Issues

- TEVATRON
- Lifetime at 150 GeV & Proton Intensity
- Re-wiring of the octupole circuits – differential chromaticity
- Shielding of the F0 Lambertsons
- Done during shutdown
- Further chromaticity adjustments to be made
- Emittance Preservation up the ramp
- High energy helix optimization
- First pass complete
- Further optimizations to be made
- Low beta optics optimization
-  * from 40 cm to 35 cm at both IP’s
- Orbit Control
- Move B0 low beta quads – to be done in March ’04 shutdown
- Finish unrolling of TEV dipoles

## Machine Issues

- Recycler
- Injection and Extraction Transfer mechanics
- Transverse stochastic cooling cooling rate
- Longitudinal emittance dilution
- During injection and extraction
- During storing
- Beam stability
- Transverse emittance growth is NO LONGER an issue
- Recycler bake-out was extremely successful
- Transverse emittance growth reduced by a factor of 4-5

## FY04 Performance as of February 20, 2004

## FY04 Performance as of February 20, 2004

- TEV Abort
- Problems

- CDF Roman
- Pot Incident

- TEV B1
- Vacuum Problems

- TEV 152 GeV
- Chromaticity
- Problems

- Recycler Shots
-  to the
- TEVATRON

- Recycler Shots
-  to the
- TEVATRON

## FY04 Performance as of February 20, 2004

## FY04 Store Parameters as of February 20, 2004

## FY04 TEVATRON Parameters as of February 20, 2004

## FY04 Antiproton Parameters as of February 20, 2004

## Integrated Luminosity and Store Hours per Week

- 10 Store
- Running
- Average

## FY04 Average Store Hours per Week

## Peak Luminosity

- 10 Store
- Running
- Average

## FY04 Performance

- The Luminosity per week is up 84% from FY03
- The number of store hours per week is up 59% from FY03
- Antiproton transfer efficiency is up 22% from FY03
- Lifetime at 150 GeV
- Larger Aperture
- Alignment and dipole un-rolls
- Emittance dilution reduced
- Smart bolt retrofit -> de-coupling at TEV injection
- The peak luminosity is up 50% from FY03
- More store hours
- Longer Stores
- Larger Stacks

## Reliability

- The number of store hours per week is up 59% from FY03
- Although the statistics are very low, we believe the TEV is a more reliable machine (Details in P. Czarapata’s and E. McCrory’s talks)
- Alignment of the TEV
- Dipole un-rolls
- Low Beta alignment
- Smart bolt retrofit
- Reliability strategy
- Aggressively pursue systematic failures
- Components (VFC’s...)
- Systems – (i.e. TEV abort system)
- Operations strategy
- Run long stores
- Avoid ramping the TEV
- Build up stacks for insurance
- Minimize the effects of store turnaround time
- Minimize impact of parasitic studies
- Short focused dedicated studies
- Configuration control

## Operations Strategy

## Operations Strategy Store Length

- Luminosity per store is roughly proportional to store length
- Plus
- Longer store – more integrating
- Bigger stacks to shoot from
- Minus
- Stack rate decreases with stack size
- Pbar Emittance increases with stack size
- Luminosity decays with time (lifetime)
- Since store length has a weak effect on integrated luminosity per week, we want to run long stores because
- Minimize effects of store turn around time
- Minimize the time we are ramping the TEV (most dangerous time)
- Build up stacks to recover from possible lost store
- Minimizes impacts of parasitic studies

## Operations Strategy - Luminosity Potential

## Shot Strategy - Pbar Parameters

## Shot Strategy - Luminosity Lifetime

## Operations Strategy - Optimum Stack Size

## Study Strategy

## Dedicated Studies in FY04

- The Recycler must be commissioned for the Upgrades
- The TEV is close to the FY04 Design Goals
- The pbar stacking rate is far from the FY04 design goals
- We have tried to give 1⁄2 shift of studies every other stacking period
- While the present TEV reliability is excellent, we are still recovering from equipment failure during December
- We have kept TEV studies to a minimum while building our FY04 average store hours per week to 85 hours
- Once we reach 85 store hours per week we will _aim_ to have one shift of TEV studies after every _other_ store.
- Our first series of studies is actually a short shutdown to:
- Install the  optical filters for Debuncher Momentum cooling
- Roll quads in P1 line for injection matching
- Horizontally align the low beta quads at B0 to gain margin in corrector strength
- We will coordinate this shutdown with CDF’s investigation of their COT
- The next set of TEV studies will focus on:
-  *optics correction
- Octupoles
- High energy helix optimization
- We will also have one shift Pbar Studies every other store
- leads the TEV studies in time by 2 shifts

## Pbar Studies to date in FY04

## AP2 & Debuncher Studies

## Main Injector Studies

- MI studies have about 8 hours per week of impact on the TLG.
- The studies that took the largest percent of the time were
- SY120
- 2.5 MHz acceleration.
- Other studies
- Aperture scans
- coalescing checks and tuning
- Barrier RF studies.
- Numerous slip stacking studies
- these are 0.5 second cycles that usually can be inserted between stacking cycles with no impact on stacking.

## TEVATRON Studies to date in FY04

## Recycler Pbar Tax

- 91 hours of stacking dedicated to making pbars
- 46 hours of shot setup time.
- 23 hours of TLG time for studies with protons

## FY04 Lessons

## FY04 Lessons

- TEV Abort
- Because of the Experiments’ silicon detectors, we cannot tolerate “messy” aborts
- A single messy abort triggers a TEV study to determine cause and fix
- A procedure to verify that the abort system is working properly.
- Examine the possibility of a hardware system that can detect if the abort system is functioning
- TEV Beam Power
- Review of the policy for masking aborts
- Upgrade the Tev BLM System so that the BLM system is the primary trigger for the abort system (late summer 2004?)
- TEV Abort Task force
- Paul Czarapata as leader
- Members of Beams division (TEV, EE support, Instrumentation, controls)
- Members of CDF and D0

## FY04 Lessons

- Investigation of the 16 House Quench
- Team formed from Operations, TEVATRON, EE Support, Mech Support, and the Rapid Response Team

## FY04 Lessons

- Linac Klystrons
- Spare Situation “vulnerable” – similar to the 7835 tube
- Linac Klystron Task Force
- Ralph Pasquinelli – leader
- Examine the state of our present spare situation and recommend improvements for Handling, Training, Engineering, and Procurement
- Improve the performance of our Klystron Test Stand
- Suggest the optimum arrangement for testing Klystrons and sending RF power to Mu-Cool
- TEV Ramp Maintenance
- TEV performance will “drift”
- Balance between regular maintenance and “don’t fix if it’s not broke”
- Maintenance of the TEV ramps
- If maintenance is required, mandatory checkout on both helices of:
- Orbits,
- Tunes
- Chromaticities

## FY04 Lessons - Transverse Position of IP at CDF

- Location of IP was 4-5 mm too high vertically
- Significant impact on CDF’s
- Silicon tracking efficiency
- SVX longevity due to radiation damage
- Rapid response team was organized during the 1 week shutdown in early December (due to the 16 house quench) to find a solution to move the CDF IP down by 4 mm
- Within 1 week: designed, installed, and commissioned a series of low beta quad moves that
- Moved the IP down by 4mm
- Put the beam through the center of the low beta quads
- Better aligned the quadrupoles

## Summary

- Our goals in FY04
- Operate the Collider at the Main Injector project luminosity design goals
- Integrate over 300pb-1 in 39 weeks
- Prepare the Collider for implementation of the initial stages of the Run II Upgrades
- Commission the Recycler for electron cooling
- Protect the TEVATRON and the Detectors
- Robust Abort system
- Beam loss monitor system that reliably triggers the abort
- The Fall 2003 shutdown was aimed at
- Installing equipment needed to attain the FY04 luminosity goals
- Baking the Recycler
- The current FY04 performance
- Is above the FY04 design curve
- The Luminosity per week is up 84% from FY03
- The number of store hours per week is up 59% from FY03
- Antiproton transfer efficiency is up 22% from FY03
- The peak luminosity is up 50% from FY03