Yuri Kamyshkov University of Tennessee kamyshkovutk'edu

1
DUSEL Meeting, Lead SD, April 24-26, 2008
1-km Vertical Space Working Group
Talks posted at http//hepd5s.phys.utk.edu/nnba
r/April/
Yuri Kamyshkov / University of Tennessee
(kamyshkov_at_utk.edu)
2
Vertical LOIs
? in 2005 Homestake PAC received following
vertical LOIs 7 NNbar search for neutron
to antineutron transitions (Yuri
Kamyshkov/UT) 23 Study of diurnal Earth
rotation (Bill Roggenthen/SDSMT) 33 Physics of
cloud formation (John Helsdon/SDSMT)
? New LOIs that appeared in 2007 Cold atom
interferometry for detection of gravitational
waves
(Mark Kasevich / Stanford
U) Search for transitions to mirror matter
(n ? n?) Mirror matter is an alternative
explanation of the dark matter can be
searched within NNbar (Anatoli Serebrov / PNPI)
meetings with Jose Alonso and Lee Petersen
discussions about reactor use with LBC group
3
Requirements of different vertical experiments
requirements for straightness and verticality
4
Vertical Facility makes DUSEL unique
5 5137?
Yates
Ross
we still do not know whether 5 is usable
5
NNbar DUSEL Sensitivity Reach
Most exciting for experiment is a possibility of
increasing sensitivity by large factor ? 1,000
(or ?nucl ? 1035 years)
with no background one event can be a discovery!
6
Neutron source 3.4 MW annular core research
TRIGA reactor with Liquid D2 cold neutron
moderator
TRIGA Training Research Isotopes from General
Atomics
Neutron elliptical focusing reflector
7
Neutron shaft
Schematic of annihilation detector
Detector Hall
Door
Access Tunnel
Control Room Electronics
Neutron Dump
8
NNbar Atomic Interferometry schematic
TRIGA reactor
NNbar reflector
lt100m
1.5 km
big vacuum tube
gt 1 km
atomic interferometry envelope
NNbar annihilation target
30 cm
? 4m
9
T-drop Experiment (Jose Alonso)where T is
Stanford is dropped for Sanford
Mark Kasevich Atomic Interferometry
10
John Helsdon Clouds Formation
11
Rough cost ideas
NNbar min-max range 169M-342M
Running 3-5 years after construction
12
Diurnal Rotation

• Being done by NASA with high accuracy (but not
  100 of time)

• Makes wonderful EO project

The eastward deflection of free falling bodies
was predicted by Newton (1679). And several
experiments (notably those of Robert Hooke)
appeared to confirm the result. The most careful
measurements were probably those of F. Reich
(1831 published in 1833), who dropped pellets
down a mineshaft 188 m deep and observed a mean
deflection of 28 mm. This was smaller than the
value following from the prediction ( 40 mm),
the decrease being due to air resistance
effect.
(Classical Dynamics of Particles and Systems, by
J. B. Marion , S. T. Thornton)

• After completion of NNbar experiment large
  vacuum tube can be
• available for 1.5 km drop ( 900 mm
  deflection).

13
by Lee Petersen
14
(No Transcript)
15
Common VF Engineering Activities we plan to study
within S4
16
Development of individual projects and issues

• NNbar RD submitted to NSF in December
  focusing on Reactor
• implementation feasibility studies including
  substantial EO component.
• other technical and engineering feasibility
  studies.

• Atomic Interferometry with ongoing RD and
  10m prototype at Stanford.
• Ongoing feasibility study for seismic
  effects/limitations/mitigations 6 months

• Cloud Chamber No much RD efforts presently.
  Needs more developments
• and feasibility studies. Needs larger
  community for facility development and
• construction.

Small SUSEL RD proposed (initiated by NNbar)

• Environmental thermal neutron fluxes
  measurements/monitoring with LBC
• 3D magnetic field measurements in vertical
  shafts
• Development of techniques for vertical shaft
  geometry, straightness,
• and verticality measurements

17
People in Vertical community
Atomic Interferometry Collaboration
(Stanford) Experiment Mark Kasevich Jason
Hogan David Johnson Alex Sugarbaker Theory Surjeet
Rajendran Peter Graham Savas Dimopoulos
Cloud Chamber facility John Helsdon / SDSMT 30
Collaborators from USA, UK, Germany, Israel,
Japan, Argentina, China, Russia
Plan to organize a Vertical Scientific and
Technical Workshop at SUSEL/SD
18
Preliminary NNbar Project Development Plan
construction feasibility
2009
2011
2015
2013
conceptual design
prelim design
board approve
construction
We guessed that CD-0 type of decision will be
needed for all vertical projects
19
CD0 review problem
At the Washington, DC DUSEL meeting in November
2007 summary recommendations of S1 group for
N-Nbar experiment were "NNbar oscillations
needs expert scientific and technical review for
scientific validation, review hazards
(backgrounds/politics) with reactor. "n-nbar
needs scientific review delicate issue of
neutron source "N-nbar 170-340M with 5 shaft
Special review needed "Regulatory, PR aspects of
the neutron source for n-nbar experiment"
We understand that this expresses the view of the
scientific community that NNbar project needs to
be examined by CD0 level process
Jon Kotcher/NSF review should be organized
within DUSEL scientific development
process NNbar Collaboration is trying to create
a possibility for being reviewed. NSF Scientific
and technical merit review equivalent to DOE CD0.