Structure of MLL Tandem operation ExperimentsHIAT09/papers/presentazioni/TU4.pdf · Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2008 ... Jan Feb Mar Apr May Jun Jul Aug Sep Oct

Dr. L. Beck 1

Maier-Leibnitz-Laboratorium – Tandem Operation and Experiments –

Structure of MLLTandem operationExperiments

Dr. L. Beck 2

Maier-Leibnitz-Laboratorium

Am Coulombwall 685748 GarchingGermanyTel. 089/289-14271

MP 8 - 1970

Dr. L. Beck 3

Who is involved?

TUM/Uni-BW LMU

ClusterOrigin and Structure of the Universe

Cluster MAPMunich Centre for Advanced Photonics

Dr. L. Beck 4

Where ?

UCN-SourceUCN-Experiments

Ultra Cold Neutrons

CompassSpinstructure of nucleons

ATLAS (LHC)

Astroparticle PhysicsWimps

Nuclear PhysicsApplied nuclear physics

FRM-II

CERN

Tandem-acceleratorGSI

Nuclear- and Hadronphysics

Dr. L. Beck 5

Tandem Laboratory Outline

Dr. L. Beck 6

Operating statistics 2008

• Reliable operation6600h

• ~13 MV11

12

13

14

15

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec2008

Term

inal

Vol

tage

(MV

)

Maximum voltage for eperimental use

0

10

20

30

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec2008

Day

s

Routine operation Maintenance and shutdowns

Dr. L. Beck 7

Charging Chains

Dr. L. Beck 8

Terminal

14 Millionen Volts

Charging chains(red)

Stripperfoil

Accelerating tube

MP-Tandem van de Graaff®

2 sets of 3 charging chains

Dr. L. Beck 9

Replacement of HE Charging chains

Why?

Ripple in Terminal voltage correlatedwith chain speed.

Installed September 1990 !

130 000 h of operation

Replaced April 2009

Dr. L. Beck 10

Replacement of LE Charging chains

Why?

Installed August 2005

24 000 h of operation

Replaced May 2009

Dr. L. Beck 11

LE-Chain Spacer Problem

Installed 8/2005Replaced 5/2009Delrin since 1993 (Nylon before)

Dr. L. Beck 12

Lens 5 – Tank exitbeam at maschine exit with y-deviation?Solution: y-steering

Lower field

Dr. L. Beck 13

Lens 5Resistance: 0,4 Ohms allInductance: good coil 800 µH – bad coil 150 µH

Replacement of all 4 coils in December 2008 (Spare coils from Heidelberg)

Dr. L. Beck 14

Idler Wheels - Storage

Storage in dry atmosphere!

Dr. L. Beck 15

SF6 – 2,5 t in 2008

From VivitronCompany: Avantec

Dr. L. Beck 16

Scientific Council of MLL (March 2001):

The Tandem accelerator as a research machine should be

phased out when MAFF becomes operational,

as foreseen for 2004.

MAFF project stopped! No funding!

Dr. L. Beck 17

Part III: Experiments

Nuclear PhysicsApplied Physics

Great demand for beamtime in thenext years

Dr. L. Beck 18

Experiments 2008Distribution of beam time to experiments

AMS18%

Irradiation of cells14%

ERDA19%

Nuclear Physics21%

Detector Tests7%

Training of students7%

Irradiation of U-Samples

14%

Dr. L. Beck 19

Ion Beam Time 2008

0,00

5,00

10,00

15,00

20,00

25,00

H-1

H-2

He-3

He-4

Li-7

B-11

C-12

O-16

Al-26*

Cl-36 *

Ca-41*

Mn-53 *

Ni-58

Ni-59*

Ni-63 *

I-127

Au-197

Pu-244 *

Others

Ion beam time in percent of total available beam time.Isotopes marked with an * were measured in AMS studies

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Q3D – Magnetic spectrograph

Dr. L. Beck 21

Q3D - Principle

High resolution nuclear physicsERDA

Dr. L. Beck 22

SupraleitendesNanoskop

für angewandtekernphysikalische

Experimente

Bestrahlung von lebenden Zellen miteinzelnen, hochenergetischen Ionen

auf 0,5 µm genau.Irradiation of living cells with single ions.Study of DNA – repair mechanisms.

Biochemische Markierungder Schäden

im Erbgut DNA

Micro-beam setup SNAKE

Dr. L. Beck 23

Spirit

Support of Public and Industrial Research using Ion beam Technology

SPIRIT represents an Integrated Infrastructure Initiative funded by the European Commission.

SPIRIT integrates 11 leading ion beam facilities from 6 European Member States and 2 AssociatedStates.

7 partners provide TransNational Access to their facilities. Ions are supplied in an energy rangefrom below 10 keV to more than 100 MeV for modification and analysis of solid surfaces, interfaces, thin films, and soft matter, in particular on the nanometer scale.

http://www.spirit-ion.eu/Project/Transnational-Access.html

Successes:

Dosimetryof fast neutronsHiroshima

Detection of a supernova2-3 Mio. years ago

AMS Setupultrasensitive detection of isotopes up to 1 : 10 000 trillions (10-16)

Dr. L. Beck 25

GAMS

Dr. L. Beck 26

Neutron detectors

Pulsed Neutron source

Energy measurement via

time of light

TOF

Scattering angle

Cryostat with detector

DetectionDetection of of DarkDark MatterMatter• Development of cryo-detectors for the detection of dark matter candidates

(WIMPs)• Installation of a KELVINOX400 3He/4He cryostate at MLL• Test with neutrons hitting a CaWO4 crystal at ~10mK

Experimental setup:

Dr. L. Beck 27

Instruments 2008Instruments

Gams19%

I-607%II+50

10%II-109%

II-503%

Q3D24%

Snake13%

I-401%

I-201%

I+1013%

GamsI+10I-20I-40I-60II+50II-10II-50Q3DSnake

Dr. L. Beck 28

FINE

Maier-Leibnitz-Laboratorium �– Tandem Operation and Experiments – Maier-Leibnitz-LaboratoriumWho is involved?Where ?Tandem Laboratory Outline Operating statistics 2008Charging ChainsMP-Tandem van de Graaff®Replacement of HE Charging chains Replacement of LE Charging chains LE-Chain Spacer ProblemLens 5 – Tank exitLens 5Idler Wheels - StorageSF6 – 2,5 t in 2008Scientific Council of MLL (March 2001):Part III: ExperimentsExperiments 2008Ion Beam Time 2008Q3D – Magnetic spectrographQ3D - PrincipleMicro-beam setup SNAKESpiritAMS SetupGAMSDetection of Dark MatterInstruments 2008FINE