# Presentation: 812918

## An Overview of MiniBooNE

## The MiniBooNE Collaboration

- _S. Koutsoliotas_
- _Bucknell University, Lewisburg, PA 17837_
- _ _
- _E. Church, I. Stancu, G. J. VanDalen_
- _University of California, Riverside, CA 92521 _
- _ _
- _ _
- _R. A. Johnson, N. Suwonjandee_
- _University of Cincinnati, Cincinnati, OH 45221_
- _ _
- _ _
- _L. Bugel, J. M. Conrad____, J. Formaggio, M. H. Shaevitz,__ ____ Co-spokespersons: J.M. Conrad and W. C. Louis._
- _B. Fleming, E. D. Zimmerman_
- _Columbia University, Nevis Labs, Irvington, NY 10533_
- _ _
- _ _
- _D. Smith_
- _Embry Riddle Aeronautical University, Prescott, AZ 86301_
- _ _
- _ _
- _C. Bhat, S. Brice, B.C.Brown, R. Ford, P. Kasper, I. Kourbanis,_
- _ __A. Malensek, W. Marsh, P. Martin, F. Mills, C. Moore,_
- _ __A.D. Russell, P. Spentzouris, R.J. Stefanski, T. Williams_
- _ __Fermi National Accelerator Laboratory, Batavia, IL 60510_
- _ _
- _ _
- _ __J. Boissevain, G. T. Garvey, E. Hawker, W. C. Louis__*__, G. B. Mills,_
- _ __V. Sandberg, B. Sapp, R. Tayloe, D. H. White_
- _ __Los Alamos National Laboratory, Los Alamos, NM 87545_
- _ _
- _ _
- _R. Imlay, H. J. Kim, A. Malik, W. Metcalf, M. Sung_
- _Louisiana State University, Baton Rouge, LA 70803_
- _ _
- _ _
- _B. Roe,  N. Wadia_
- _University of Michigan, Ann Arbor, MI 48109_
- _ _
- _ _
- _A. Bazarko, P. D. Meyers, F. C. Shoemaker_
- _Princeton University, Princeton, NJ 08544_

## Purpose of MiniBooNE

-  To check the LSND signal (            &               )
-  To Keep LE ~ 1, but have different systematics
-  (Change the signature and background)
- A high flux       beam
- 	With well-understood       content
- 	With E about ten times higher than LSND
- 		(goal: ~ 1GEV)
- A Large fiducial volume detector
- 	Located from 250 to 1000m from source
- 	With good particle id capability
- With the goal of observing:
-        	C  e- N and      C  e+ B
-     	   “Quasi-elastic Scatters”

## Parameter Space

- All measurements,
- present and future,
- shown on one plot.

- MiniBooNE will explore
- the LSND region with
- high precision.

## Low Energy Neutrino Physics

- 2. Neutrino-Charged Current Scattering. Measure MA, the axial-vector dipole mass. Compare       to        scattering off carbon.
- 3. Neural Current     Production to Probe the Structure of the Weak Neutral-Current.
-  4. Measure Neutrino-Electron Neutral-Current Scattering Cross-Section to search for evidence of a magnetic moment of the Muon Neutrino.

## Schematic Overview of MiniBooNE

- MiniBooNE is a single detector experiment.
- The MiniBooNE run will begin at the end of 2001.
- If we see a signal... Phase II:BooNE-2 detectors.

## Schematic of the Beam

## The Booster

-  Rep Rate Issues
-  Septum Magnets
- RF substation breakers
- MP01, MP02, and ORBMP power supplies
- Further testing of ORBMP system needed because
-     X-former could not handle the rep rate.
-  Intensity Limitations
-  Extraction Losses
-  Magnet Alignment
-  Evolution of L3 (MI Extraction Aperture)
-  Additional Shielding
-  Radiation Monitoring
-  Beam Loss Monitors
-   5e12 can be achieved routinely!

## 8 GeV Beam-Below Grade

- Magnets for the 8 GeV Transport
- come from retired beam-lines.

- Construction is done in concert
- with the Target Hall and Decay
- Pipe.

- Instrumentation is presently
- being procured and built.

- Beam losses must be kept below ~ 2% to keep the tunnels habitable. We will utilize loss-monitors.
- In addition, will utilize an e-berm. Measure proton intensity at entry and exit, and trip the beam if unequal.  This will enhance the earth shielding.

## Target Hall-Below Grade

- For groundwater protection, the decay pipe
- is surrounded by a membrane, much like a landfill.

## Schematic of Target Pile

- Fe

- Heavy
- concrete

- 30 T crane

- Decay pipe

- Final collimator

- Horn

- Coffin

- MI-12 Building

-  Hot horn removal involves the use of a coffin.
-  Beam elements are removed before coffin is installed.

## Target and BPM Assembly

- Vacuum Pipe

- Four Small Radius BPM’s

- End of Vacuum Pipe with window
-        (Cooling pipes on side)

- Beryllium Target

-  65 cm Beryllum target with helium cooling
-  Cooling tests have been carried out at Los Alamos
-  Construction will begin soon
- Hadroproduction studies will be done for our energy and target
-     (BNL910 and HARP)

## Target and BPM in Mounting

- Here we see the beam pipe, beam position monitors, cooling pipes, and monitor cables mounted on a channel in front of the horn.  The target isn’t visible, it protrudes into the neck of the horn.

## Horn Assembly, Cover Open

- Target is inside the inner conductor

- Charged pions and kaons are
- focussed toward the detector
-                     with a single horn.

-  The Design:
-  _[http://www.bartoszekeng.com/mboone/mboone.htm](http://www.bartoszekeng.com/mboone/mboone.htm)_
-  170 kA, 5 Hz (average), 200M pulses/year

- 8 GeV
- Protons

## Horn Assembly in Box

-              The horn engineering review
-        included experts from FNAL,
- CERN and BNL – Concluded that we are ready to go ahead with a
- prototype.

*The work done on the horn has been most impressive. It was the general feeling that no previous horn had been so well engineered in terms of stress calculations, metal fatigue issues, water erosion and structural resonance. -  P. Czarapata, Chairman*

## Tests at MI-8

-  Pre-prototype tests for various sub-elements of the horn and its supply have been completed.
- Extensive prototype tests will take place at MI-8:
-  The horn power supply is being assembled,
-  Two SCR stacks have been tested under voltage,
-  Proto-horn parts are in procurement and being collected at MI-8 and at the Industrial Center,
-  Construction of the proto-horn will begin in the winter, and tests should begin by spring,
-  The proto-horn will be tested to about 10 million pulses.

-  Ultimately, we hope to have an installed horn and a spare in addition to the proto-horn.

## The Decay Region

- little muon counter

- muon monitors

-  The decay region has two absorber positions: 25 and 50m.
-  Varying the decay length provides a crosscheck on backgrounds.

## Muon Monitor

- Monitor

- Fe

- Fe

- concrete

- Ionization
- Counters

- One each at 25m
- And 50m location.

## The Neutrino Beam

- For a 50m decay
- length, flux in
- detector located
- at 500m:

-  This flux is optimized for our design goals.
-  This is a single horn beam.
-  Intrinsic beam backgrounds:
- Inferred from       interactions,
- Measurements from lmc,
- Simulation based on production measurements.

## Status of Civil Construction at the Target Hall

-  Aside from some glitches, work is progressing very well.
-  NTP was given on June 7, 2000.
- We hope for B.O. on March 27, 2001.

- A glitch

## Civil Construction Schedule-8GeV Beam & Target Hall

- M.S. #0	Notice to Proceed given to Subcontractor			0cd 	6/5/00
- M.S. #1	Critical shop dwgs submitted for MI-12 Bldg. & Beamline Enclosure	18d	6/23/00
- M.S. #2	MI-12 Bldg conc. walls complete to El. 744’-0, Bottom layer of 		70cd	8/14/00
- 		 HDPE System installed, 25 & 50 M Absorber conc. work. is, and
- 		 complete Accelerator shutdown lasting 3 weeks.
- M.S. #3	HDPE liner envelope is complete, backfilled and rough graded		130cd	10/13/00
- M.S. #4	Accelerator Shutdown - lasting 3 months (Nov. 1, 00)		148cd	11/1/00
- M.S. #5	MI-10 Beampipe jacking is complete			156cd	11/9/00
- M.S. #6	Alcove and Beamline Enclosure structures are complete		233cd	1/22/01
- M.S. #7	Alcove & Beamline Encl. backfilled to grade, Mech, Elect, & 		315cd	4/16/01
- 		 Controls for Beamline Encl. are complete
- M.S. #8	Beneficial Occupancy of MI-12 Building, (FIRUS System installation	377cd	3/27/01
- 		has been completed by Fermilab)
- M.S. #9	Project complete.    				397cd	7/16/01

## Schematic of Detector Tank

-  Pure mineral oil throughout
- 807 tons total, 445 tons fiducial
- 1280 phototubes in the detector region
- 240 phototubes in the veto reion.

## Construction of the Detector

- http://www-boone.fnal.gov/public/constr

- Civil construction is nearing completion.
- B.O. on Oct. 12, 2000.
- Interior paint problem is being resolved.

- Tube tests are ongoing:
- 510 tubes tested,
- 1060 left to go.
- Tube support material
- will arrive soon, preparing
- for installation.
- Oil tests are progressing,
- preparing for acquisition.

## Tank and Phototube Mounting System

- Person access to tank.
- Equipment is lowered from top.

- Prototype phototube
- Support system at
- Princeton.

## Project Milestones

## Current Status

- Tests,
- studies,
- new gear.

- Horn &
- Supply tests
- and construction

- Civil ending,
- technical
- beginning.

- Monitors in
- fab. & installation.

- Civil construction has begun.

- We’re on schedule, more or less!

-  All civil construction is underway.
-  the Booster is making progress toward hi-intensity hi-rate operation.
-  8 GeV beam components are being fabricated.
-  Horn and supply are coming together.
-  Work is progressing well on detector.

## Conclusions

-  The MiniBooNE and 8 GeV Beam projects are well on their way.
-  Next year will be critical, since all phases of the project will come to near completion, and we will be preparing for start-up.
-  This is an exciting time, for what promises to be a most interesting experiment!

## End of Talk, some useful x-parencies follow:

## 8 GeV Beam-Above Grade

## Target Hall-Above Grade