25 years of research in nuclear and particle physics
Download
Skip this Video
Download Presentation
25(+) Years of Research in Nuclear and Particle Physics

Loading in 2 Seconds...

play fullscreen
1 / 57

25(+) Years of Research in Nuclear and Particle Physics - PowerPoint PPT Presentation


  • 181 Views
  • Uploaded on

25(+) Years of Research in Nuclear and Particle Physics. Prof. Donald Koetke Valparaiso University. 5 February 2010. Outline. Nuclear Physics vs. Particle Physics Experiment Goals Experimental Methods A Timeline The Local Players The Future. Nuclear Physics.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' 25(+) Years of Research in Nuclear and Particle Physics' - yagil


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
25 years of research in nuclear and particle physics
25(+) Years of Research in Nuclear and Particle Physics

Prof. Donald Koetke

Valparaiso University

5 February 2010

outline
Outline
  • Nuclear Physics vs. Particle Physics
  • Experiment Goals
  • Experimental Methods
  • A Timeline
  • The Local Players
  • The Future
nuclear physics
Nuclear Physics
  • Nucleus: any assembly of one or more nucleons
  • Nucleon: proton or neutron
  • Simplest nuclei: 1H (proton); 2H (deuteron)
  • Nuclear physics (I): any experiment whose goal it is to learn about the properties of the nucleus.
  • Nuclear physics (II): any experiment in which a nucleus plays a role (e.g., as a target)
particle physics
Particle Physics
  • Particle physics (I): study of members of the “particle zoo”
    • Baryon family (n,p,o,o,+,-,o,+,-, …)
    • Meson family (,,,K,,,,B,D, …)
    • Lepton family (e,,,e,, )
    • Force propagators (,…,,W+,W-, o)
  • Particle physics (II): study of
    • quarks, leptons, bosons (photons, gluons, W+,W-, o)
  • Particle physics(III): studies of the Standard Model
research goals
Research Goals

To understand and describe nature in terms of its most fundamental objects and interactions.

how to do these experiments

-

K+

+

How to do these experiments?

Source

Detector

H

Synchrotron

HydrogenInteraction Target

Linac

DAQ

Cu

Production Target

VelocitySelector

MomentumSelector

research timeline

ANL

S17

Y*

US DOE Funding ANL & LANL

Research Timeline
slide10

S17

Why?

?

slide11

 = 53 d

S17

Why?

How do you test this theory?

What gets out of the center of the sun that you can measure?

slide12

Predicted

Measured

S17

Why?

“Solar Neutrino Problem”

A reaction rate used in the Solar Model is wrong!

Hypothesis:

slide13

 = 53 d

S17

Why?

How do you test this theory?

What gets out of the center of the sun that you can measure?

slide14

S17

Where?

4 MeV Dynamatron proton accelerator

slide15

4

S17

research timeline1

Appear

ANL

S17

Y*

US DOE Funding ANL & LANL

US DOE Research Grant at VU

Research Timeline
slide17

Predicted

Measured

Will NOT be detected in expt!

Appear

Why?

“Solar Neutrino Problem”

Hypothesis:

slide18

Appear

Why?

Implications --

Explain Cold Dark Matter?

Standard Model is Wrong

slide19

Appear

Where?

slide20

7400 ft

Town

Laboratory

Appear

Where?

slide21

Accelerator (LAMPF)

p (800 MeV)

Appear

Where?

research timeline2

Appear

ANL

S17

MEGA

Y*

US DOE Funding ANL & LANL

US DOE Research Grant at VU

Research Timeline
slide24

Lepton families do NOT mix.

MEGA

Why?

Q: Why NOT??

A: ?????

slide25

Accelerator (LAMPF)

p (800 MeV)

MEGA

Where?





slide26

28

MEGA

slide27

67

MEGA

research timeline3

Crystal Ball

Appear

ANL

S17

MEGA

Y*

US DOE Funding ANL & LANL

US DOE Research Grant at VU

Research Timeline
slide29

Crystal Ball

  • Previous data were limited in precision because of limited detection efficiencies.

Why?

  • We had access to a much more advanced detector with much better efficiency for detecting high energy photons.
slide30

Crystal Ball Detector

672 NaI detectors

Alternating Gradiant Synchrotron

Crystal Ball

Where?

research timeline4

Crystal Ball

Appear

ANL

NuSea

S17

MEGA

Y*

US DOE Funding ANL & LANL

US DOE Research Grant at VU

Research Timeline
slide34

u

u

d

d

d

u

Proton

Neutron

Nuclear Sea (of quarks)

NuSea

Why?

The sea quarks must be very important for nucleons

research timeline5

Crystal Ball

TWIST

Appear

ANL

NuSea

S17

MEGA

Y*

US DOE Funding ANL & LANL

US DOE Research Grant at VU

Research Timeline
slide38

Triumf Weak Interaction Symmetry Test

TWIST

Why?

Standard Model Values

slide39

Triumf Weak Interaction Symmetry Test

TWIST

Why?

Actual Measured Values

slide40

TWIST

Where?

Vancouver, BC

slide41

TWIST

36

  • Improve precision on the weak interaction physics by ~factor of 10!
  • So far all values agree with Standard Model (assumed) values.
  • Stay tuned for final results…

New & final results will be released at the APS meeting in D.C. next week!

research timeline6

Crystal Ball

TWIST

Appear

ANL

NuSea

S17

MEGA

Y*

US DOE Funding ANL & LANL

US DOE Research Grant at VU

Research Timeline
slide43

Solenoid Tracker At RHIC

STAR

Why?

  • Because the intrinsic angular momentum (spin) of every proton we have ever seen is exactly the same - but nobody knows how it comes to be this value!! We need to understand this at a fundamental level.
  • Because we now have the tools to do this experiment and the composite model of the proton is now well established - probably.
slide44

STAR

RHIC counter-circulating beams

Where?

slide46

STAR

369

slide48

53

STAR

research timeline7

nEDM

Crystal Ball

TWIST

Appear

ANL

NuSea

S17

MEGA

Y*

US DOE Funding ANL & LANL

US DOE Research Grant at VU

Research Timeline
slide51

Intrinsic spin angular momentum (1/2)

Qnet = 0.0

Magnetic Dipole Moment−1.9130427(5) μN(−9.6623640 × 10−27 J/T)

neutron Electric Dipole Moment

nEDM

Why?

slide52

nEDM

Where?

slide53

VU Physicists

  • Prof. Randall Fisk *
  • Prof. David Grosnick
  • Prof. Donald Koetke
  • Prof. Robert Manweiler
  • Mr. Paul Nord
  • Prof. Shirvel Stanislaus
  • Dr. Jason Webb *
slide54

VU Students

Dale Koetke (‘86), Philip Nickel (‘88), Hope Concannon (‘90), Jim Kolterman (‘91), Paul Nord (‘91), Jay Dittmann (‘92), Grant Kiehne (‘92), Laura Nickerson (‘96), Nathan Bachmann (‘93), Adam Gibson (‘00), Daniel Allen (‘00), Robert Greene (‘00), Christopher Hoffman (‘01), Jon Thoms (‘01), Steve Wolf (‘03), Louis Kastens (‘04), Sarah Schlobohm (‘04), Brian Bucher (‘05), Ross Corliss (‘05), Tim Rogers (‘05), Jason Summerlott (‘06), Josh Vredevoogd (‘07), Ted Hopkins (‘07), Noah Schroeder (‘08), Daniel Trubey (‘09), Ansel Hillmer (‘09), Nathan Kellams (‘10),Tim Olson (‘11), Megan Kania (‘11), Ben Barber (‘12)

slide55

We have had uninterrupted funding for over 25 years!

The Funding -

  • US Department of Energy (DOE) has funded this work with over $3.5M.
  • A “renewal proposal” is submitted every three years that is peer-reviewed.
slide56

The Future (?)

  • STAR & nEDM - long term commitments with potentially significant discoveries
  • Many more VU students will have opportunities to work on world-class physics experiments in nuclear and particle physics
  • There is unforeseen new physics that will be discovered in your lifetime; stay tuned!
slide57

Closing Reflections

  • This has been a wonderful journey that has been, and continies to be full of surprises!
  • Along with the work of all my colleagues in the department we have helped --
    • to do good science
    • to educate some very fine students
    • to spread the word: VU is an excellent university.

-- Thank you

ad