# Presentation: 001922

## NuMI Startup ShiftsS. Childress, 10 Nov.’04

**NuMI initial beam startup request is for a total of four 12 hour shifts**
- One shift on each of Friday 3 Dec., Saturday 4 Dec. and two shifts on weekend of 11-12 Dec.
- Specific request for first period is
- Friday 3 Dec. 0900 – 2100 		Time request for this is to have efficient availability of support experts for the complete NuMI extraction/primary system. 	New beam-line initial startup!
- Saturday 4 Dec. 0900 – 2100
- For weekend of  Dec. 11-12, we currently look toward
- Saturday 11 Dec. 0900 – 2100
- Sunday 12 Dec. 0900 – 2100
- We will startup with only one NuMI cycle / super-cycle, beam intensity ~ 3E11 protons/extracted pulse for the first week-end, and an _*integral*_ extracted beam intensity limit of < 1E14 protons in a 48 hour period.

## NuMI Shift Teams

- Main Injector beam setup for NuMI extracted beam:
- 		coordinated by Alberto Marchionni / Dave Capista
- Two 4-person NuMI shift teams will have the MCR responsibility for consecutive 6 hour periods to cover the 12 hours of study time each day.  Physicists on these teams are:
- _Team 1_				_Team 2_
- Peter Lucas			Doug Jensen
- Malika Meddahi (CERN)		Al Russell
- Gordon Koizumi			Rick Ford
- Sam Childress, Ldr.		Craig Moore, Ldr.

## Pre-beam Checkout

- Comprehensive NuMI system checkout responsibilities (including responsible technical expert plus NuMI physicist for each system) have been established. These are being tracked now, and will continue thru start-up.
- As MI start-up progresses, we request establishing a NuMI cycle in the timeline [as will be used for beam start-up on Dec.3]. Request this established by Dec.2 to enable detailed final “dry run” checkout of all NuMI systems in advance of beam. We would be running NuMI power supplies  on the beam cycle during this time, and also verify Recycler shielding for HV101 by this time.
- MI beam setup for NuMI extraction will also be established as time permits during MI startup

## NuMI Beam Shift Priorities

**Demonstration of appropriate function using beam for essential extraction / primary systems:**
**First weekend efforts: ****(**Dec. 3,4)
- Setup extraction, with orbit bumps as established in MI studies
- With correctors off, quads at nominal settings, verify major bend current settings [Lambertsons (Ver), HV101 (Hor), then V108,V118 (ver)]. Use calculation feature of AUTOTUNE system to adjust settings
- Concurrently, verify function and timing of all beam instrumentation – toroids, BPM’s, BLM’s and TLM’s, profile monitors
- Establish beam transport thru target hall [missing horns] and to hadron absorber, using correctors as needed to accomplish this
- Initial evaluation of beam loss, optics and alignment problems

## NuMI Beam Shift Priorities (cont)

**Quantitative level of beam understanding: **(Dec.** **11,12)
- Verify kicker flat top uniformity with beam
- Establishing appropriate beam optics for loss free transport and targeting
- Mapping of component alignment
- Aperture studies using 3, 4 bumps
-  Commissioning of AUTOTUNE beam control system
- Quantitative assessment of instrumentation performance.
**We need to accomplish by the 2****nd**** weekend a solid understanding of NuMI extraction / primary problems which would need tunnel access time to resolve prior to high intensity commissioning in January**

## Support Department Needs

- As NuMI is a new beam, support department assistance could be needed for** any** of our systems.
- For this reason, we look toward a normal work day shift for initial beam startup
- Comprehensive support efforts are currently involved in checkout, with specific responsibilities established. These continue for startup
- For initial beam shift, we look toward inclusion of several key support people as part of evaluating initial beam results. Some of these people are:
- Chris Jensen [kickers]	- Steve Hays [power supplies]
- Peter Prieto {BPM’s]	- Gianni Tassotto [other 							instrumentation timing]

## NuMI Access Requirements (MI)

- A considerable effort is being invested in pre-beam checkout, which if successful, will also minimize the need for repeated MI access during the initial beam start-up
- Reality is, however, that we would request access time when this is essential to make further progress. Goal is to minimize this, to the extent possible. [Zero is the ideal]
- We do request a four hour necessary repair period during normal work hours in the week between beam study week-ends.

## Contingency Planning

-    The plan for a total of four 12 hour beam shifts from 3 December to 12 December should give us a good idea of NuMI extraction and primary transport function, in preparation for extensive NuMI beam operation beginning in January ’05.
-    In the event of significant issues which need addressing prior to high intensity operation, our requests will clearly adapt accordingly