# Presentation: 485306

## NuMI Status

- Debbie Harris
- Minerva Collaboration Meeting
- February 25, 2005

## History of Beam in NuMI

- December 3-4:  send protons down entire beamline
- January 19-22:  Put target in the beam
- Pulse Horns
- Make Neutrinos and Muons
- Do target, baffle, and horn scan
- Single Booster Batch
- up to 2e12ppp
- 60 second rep rate
- February 18-22:  Put target in the beam
- Beamline loss studies, stacking studies
- Go to multi-batch running
- Up to 2e13ppp
- 60 second rep rate

- NuMI Status, Minerva Meeting, February 25, 2005

## Primary Beam Layout

- 2 large vertical bends
- Small horizontal bends
- 370m long
- 1mm beam sigma at target
- 23 BPM’s
- 2 toroids
- 11 profile monitors
- 4 total loss monitors
- 2 BLM’s per magnet

- NuMI Status, Minerva Meeting, February 25, 2005

## Neutrino Beam Devices

- 2 Horns, pulsed at 200kA
- Inner Radius of First horn:  9mm
- Graphite Target:  6.4mm wide, 28mm tall, 95cm long
- Graphite baffle to protect Horns:  150cm long, 11mm ID
- Moving Target upstream of horns means higher energy pions focused

- NuMI Status, Minerva Meeting, February 25, 2005

## Secondary Beam Monitors

- NuMI Status, Minerva Meeting, February 25, 2005

## December 3-4:  First Beam in Beamline

- 10 pulses to get beam to Hadron Monitor

- Profile Monitors from UT-Austin

- Online Event Display from BNL

- NuMI Status, Minerva Meeting, February 25, 2005

## First Beam Neutrinos in Beamline

- Start up in same settings as
-    in December
- Hit target on first pulse
- Start pulsing horns shortly
-     thereafter

- NuMI Status, Minerva Meeting, February 25, 2005

## Watching Muon Rates Online

- Rates in 3 alcoves means you get the “peak” plus the muons from the “high energy tail”

- Protons Centered

- Protons hitting Upstream Baffle

- With muon rates like this, we must be seeing neutrinos...see Brian’s talk next

- NuMI Status, Minerva Meeting, February 25, 2005

## January Target Scan

- Very Preliminary Online Data shown here...
- Horizontal scan:  protons can go between target and baffle, and hit hadron monitor
- Vertical Scan:  protons always hitting either target or baffle
- When you hit the baffle, it’s like moving the target upstream by about 2m, so you are focusing higher energy pions—higher energy muons, so you see more activity in the 2nd and 3rd muon alcove:

- NuMI Status, Minerva Meeting, February 25, 2005

## February 18-22:going to higher intensities

- Again, start out with old settings and hit the target on first pulse...
- Do Beam loss studies by taking profile monitors in and out of the beam, aperture checks
- Go to high intensities:  2 pulses at 2.5e13, running mostly around 1.3-2.0e13
- test multi-batch running
- Do radiation survey measurements so that people can work in Near Detector hall while beam is on (and go up to electronics racks near muon alcoves)
- Get more neutrinos in Near Detector for overlap studies (in semi-Medium Energy Beam)

- NuMI Status, Minerva Meeting, February 25, 2005

## Run Plan

- Doing studies in MI now
- Plan precision target and horn scan tomorrow
- Chiller for Target hall still being finished
- Do beam studies (60 second rep rate) during the day shifts until chiller is done
- Once chiller finished, go to 2 second rep rate, single batch (0.3-4e13ppp) (March 21 at latest)
- Then go to 2 second rep rate, multi-batch (1.5-2e13ppp)

- NuMI Status, Minerva Meeting, February 25, 2005