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A University-based cyclotron laboratory for nuclear science A University-based cyclotron laboratory for nuclear science

A University-based cyclotron laboratory for nuclear science - PowerPoint Presentation

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A University-based cyclotron laboratory for nuclear science - PPT Presentation

Maxime Brodeur Importance of lowE NP research ARUNA workshop June 13 2014 Goal understand the atomic nucleus Fundamental symmetries Nuclear astrophysics Nuclear structure By providing stable ion beams and some RIBs ARUNA currently contributes in all subfields ID: 254634

2014 aruna workshop june aruna 2014 june workshop cyclotron measurements time mev production rom long rib research beam facility

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Slide1

A University-based cyclotron laboratory for nuclear science

Maxime BrodeurSlide2

Importance of low-E NP research

ARUNA workshop – June 13, 2014

Goal

: understand the

atomic

nucleus

Fundamental symmetriesNuclear astrophysicsNuclear structure

By providing stable ion beams and some RIBs, ARUNA currently contributes in all subfields.

Three main topics of studies in the low-energy domain:

These beams are however of limited reachSlide3

The problem

ARUNA workshop – June 13, 2014

CARIBU/ATLAS

at ANL

NSCL

Main options to perform experiments with exotic beams in the USA:

Highly competitive large user facilities

Beam request largely exceed available

time

Proposed

AcceptedSlide4

Side-effects

Result

: reduced experimental time

ARUNA workshop – June 13, 2014

Experiments

requiring time cannot be

performed

Few measurements can be done yearly

The 2013 low-energy community meeting statement:

“The community is

concerned

about the

lack of beam time

at existing facility and its

impact on

the

workforce development

Propose to locally produce RIBs to

address this needSlide5

Local RIB production

p-induced

fission

p

from 24 MeV commercial cyclotronI

p ~ 500mAH- machine; 2 simultaneous beamsARUNA workshop – June 13, 2014

1.1 barn at 24 MeV

TR24 from ACSISlide6

Partnership

Shared use of cyclotron with private partner

Production of medical radioisotopes

(

99mTc, …)

ARUNA workshop – June 13, 2014

The cyclotron and building will be financed by Notre Dame and the medical isotope company.

Operation of the cyclotron and operational costs (e.g. utilities) provided by the company

Cyclotron

Notre Dame

Isotope productionSlide7

Partnership

Day-time use for research (simultaneous also possible)

Lots of beam availability for nuclear experiments

ARUNA workshop – June 13, 2014

Cyclotron

Notre Dame

Isotope production

Place

where long-term and more challenging measurements can be

done…

… while

measurements on exceptionally exotic nuclei would be done at FRIBSlide8

Long-term, challenging measurements

m and

P

n

of exotic, relevant r-process nuclei

ARUNA workshop – June 13, 2014

Produced at low yield (<1 ion/h), requires long time (weeks) to perform the measurement

a

bn

of mirror transition to test the electroweak interaction

Challenging measurement requiring large statistics of

long

half-lived nuclei (t

1/2

reaching 20 min.)Slide9

RIB production method

IG-ISOL method

Universal

Well-established

Versatile

ARUNA workshop – June 13, 2014

Fission (n-rich, r-process)

Fusion-evaporation (p-rich, mirror transitions)

Can change targets for optimal productionSlide10

Calculated deliverable yields

ARUNA workshop – June 13, 2014

238

U(

p,f

)

E

p

= 30 MeV

I

p

= 10

m

A

Comparable to CARIBU with 1

Ci

252

Cf

source

Different yield distribution (complementary)

Figure from J.

AystoSlide11

RIB separation

ARUNA workshop – June 13, 2014

24 MeV p

f

rom cyclotron

Fission product

24 MeV p

from cyclotron

Non-isobaric contamination removed by dipole magnetSlide12

Isobaric

purification

ARUNA workshop – June 13, 2014

24 MeV p

f

rom cyclotron

RFQ cooler and

buncher

MR-TOF mass separator or spectrometer

I

sobaric contamination removed by

a multi

-reflection time-of-flight

separator

Can also be used for mass measurements

Bunches from RFQ

Pure bunches to Paul trap

Recall Yuan Mei’s talkSlide13

Experimental possibilities

b

-delayed n-emission BR

a

bn

of mirror transitions ARUNA workshop – June 13, 2014

Ion trap measurements:

Co

24 MeV p

f

rom cyclotron

RFQ cooler and

buncher

MR-TOF mass separator or spectrometer

Paul trap for

P

n

measurements

Could also measure t

1/2

, …

open to suggestions

Or experiments with the protons themselves; e.g. STARSlide14

ARUNA workshop – June 13, 2014

70

P

n

that CARIBU cannot produce

Which P

n can be done?

Total of 160 PnSlide15

Applied physics research opportunities

ARUNA workshop – June 13, 2014

Some measurements also have applied physics interests

e

.g.

P

n

values are important for:

The design

of

next generation nuclear

reactors

Stockpile

stewardshipSlide16

Applied physics research opportunities

Medical radioisotopes research

ARUNA workshop – June 13, 2014

e

.g. Alternate means to produce

99m

Tc

Used in 80% of

nucl

. med. procedures

Generated from

99

Mo decay, which is produced by fission in reactors

In 2016: 2 reactors responsible to 2/3 world supply set to close

Alternative:

100

Mo(p,2n) reaction using

cyclotrons

Issue: purity of

99m

Tc produced

Contamination production

s

calculation done at UND (

Couder

)

s

measurements are underway (Couder)Slide17

Conclusion

The new RIB facility will help the nuclear physics community with beam time shortage.

This unique American IG-ISOL facility would provide

a

training opportunity in tomorrow’s scientific workforce

ARUNA workshop – June 13, 2014

The cyclotron facility will allow various funding opportunities

Like other ARUNA facilities, the unfair advantage of this facility over large user facilities is time.

Allows to make long-term measurements that cannot be done at large facilitiesSlide18

Backup slidesARUNA workshop – June 13, 2014Slide19

RIB cooling and bunching

ARUNA workshop – June 13, 2014

24 MeV p

f

rom cyclotron

RFQ cooler and

buncher

Continuous beam

Cooled bunchesSlide20

Pn measurements

ARUNA workshop – June 13, 2014

24 MeV p

f

rom cyclotron

RFQ cooler and

buncher

MR-TOF mass separator or spectrometer

Paul trap for

P

n

measurements