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Radiation Source ELBE - Status and SRF gun activities - Peter Michel p.michel@fz-rossendorf.de Forschungszentrum Rossendorf Zentralabteilung Strahlungsquelle ELBE PF 510119, 01314 Dresden Germany Strahlungsquelle ELBE Dr. Peter Michel

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SLIDE 1

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Radiation Source ELBE

  • Status and SRF gun activities -

Peter Michel p.michel@fz-rossendorf.de Forschungszentrum Rossendorf Zentralabteilung Strahlungsquelle ELBE PF 510119, 01314 Dresden Germany

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SLIDE 2

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel
  • ELBE@FZ- Rossendorf
  • ELBE - LI NAC
  • Secondary radiation generation &

associated research program

  • superconducting- rf - f oto gun f or ELBE

Outline

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SLIDE 3

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

The Radiat ion Source ELBE at Resear ch Cent er Rossendorf (FZR) Radiation Source ELBE

  • I on Beam Physics and Material Research
  • Bioanorganics and Radiopharmaceutical Chemistry
  • Nuclear and Hadron Physics
  • Saf ety Research
  • Radiochemistry
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SLIDE 4

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Electrons 40 MeV 1 mA cw I R- radiation 5 – 150 (200) µm

FEL cave

γ- radiation

0 – 20 MeV nuclear phys. cave

X- rays

10 – 100 keV radiat ion phys. cave

neutrons

0 – 30 MeV neut ron phys. cave

positrons

0 – 30 keV posit ron cave (EPOS)

Radiation Source ELBE

superconduct ing Elect ron Linac

  • f high Brilliance and low Emit t ance
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SLIDE 5

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel
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SLIDE 6

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Electron source and injection

heater pulsed grid cathode anode e-beam

250 kV

4ns-80µ µ µ µs 0-1s 100µ µ µ µs-36ms

Puls structure of electron beam

1-10ps

Thermionic gun

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SLIDE 7

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

ELBE Cryomodule

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SLIDE 8

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel
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SLIDE 9

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Beam lines & Diagnostics & Others

  • vacuum system

DN 40 UHV + ion getter pumps (< 10-9mbar)

  • magnets

DANFYSIK dipole/quadrupol (< 80 MeV electrons)

  • beam viewer

OTR→digital frame grabber→online imaging/evaluation

  • emittance measurement pepperpot mask / automated quadrupol scan
  • online beam position

stripline detectors

  • bunch length

MP interferometer, Golay cells for BL optimization

  • beam loss

long ionization chambers (machine protection) current difference monitors

  • dumps

radiation cooled graphite (50 kW) + steel/concrete/water shielding

  • control system

PC based , Simatic-PLC/WINCC

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SLIDE 10

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

L c 4 f0 ⋅

  • strip length 40 mm
  • total length 85 mm

Compact version of Beam Position Monitor

Position resolution

Beam position monitoring

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SLIDE 11

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Beam loss interlock & monitoring

20...40 MeV electrons ⇒ ⇒ ⇒ ⇒ range 1,5..4 cm in stainless steel

) ( ) (

RT e c

T T t I m c S dt dT − − ⋅ = λ

t ce

T T

λ −

=

Sc = 20MeV Ie = 1mA c = 450J/Kg K m= ∆ ∆ ∆ ∆Vς ς ς ς= 63mg (dbeam=1mm, r= 10mm) TM=1400 °C

e c M crit

I S m c T t ⋅ ⋅ ⋅ =

tcrit~ 2 ms

e- γ γ γ γ

HV BLM-Signal

Gas

How to measure ? ⇒ long ionisat ion chambers (LI C)

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SLIDE 12

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Beam loss det ect or

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SLIDE 13

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

The Martin-Puplett Interferometer ( polarizing Michelson interferometer )

CTR

Bunch length measurement e-

3 2 1 1 2 3 1 0.5 0.5 1 1.5

mirror position, mm Amplitude, V

LB

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SLIDE 14

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel
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SLIDE 15

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

20 MeV 40 MeV maximum beam energy 77 pC maximum bunch charge 0.85 mA maximum beam current 1 ps >3ps bunch length σ σ σ σRMS 12 mm mrad 2 mm mrad transverse emittance ε ε ε εRMS 55 keV 35 keV energy spread ∆ ∆ ∆ ∆E (FWHM) FEL operation at 77pC Channeling at 1 pC

Electron beam parameters of ELBE

< 0.5 needed

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SLIDE 16

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Transverse emittance of the ELBE electron beam

1E-3 0.01 0.1 1 10 100 2 4 6 8 10 12 14 16

1mA @ 13 MHz (FEL) 100 µA @ 260 MHz (Radiation Physics)

ε ε ε εtrans / mm mrad (rms)

13 MHz (no aperture) 260 MHz (no aperture) 260 MHz (3mm-aperture,90 % cut) simulation of gun emittance

bunch charge / pC

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SLIDE 17

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

nuclear physics cave

e

γ

nuclear physics cave

Secondary radiation generation & associated research program

Bremsst rahlung User operat ion st art s 1/ 2003

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SLIDE 18

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel
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SLIDE 19

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel
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SLIDE 20

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Nuclear spectroscopy at ELBE

25 µ µ µ µm Al folie

γ γ γ γ-beam ~ 107 γ γ γ γ MeV-1 s-1 ~ 10-5 sr

γ γ0 γ1 Ε, Γ,J,π

precise and systematic investigation of the structure of stable nuclei

  • Energy

→ → → → excitation energy E

  • Intensity

→ → → → with G

  • Angular distribution

→ → → → spin J

  • Polarization

→ → → → parity p

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SLIDE 21

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel
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SLIDE 22

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

X- rays at ELBE

X-ray‘s

~ 10-100 keV ~ 1011 s-1

DNA

User operation starts 10/2003

  • Investigation of elementary processes of radiation damage in living cells
  • Measurement of relative biological effectiveness of photons
  • Material science: Time resolved melting and solidification processes,

visualizing phase transitions and flow phenomena in liquid metals

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SLIDE 23

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Planar (1,1,0) 17 MeV

Channeling Radiation

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SLIDE 24

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Dose limit s f or diagnost ics ? Paramet er f or an ef f ect ive t herapie ?

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SLIDE 25

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

I nf rared f rom Free Electron Lasers

Free Electron Laser (FEL)

40W 1W

5 – 25 µ µ µ µm (FEL U27) ~ 5 µ µ µ µJ per pulse ~ 1 ps

We are ready for lasing …. First Lasing: 7. May 19:39 ~ 1.5 W @ 19,8 µm

λ λ λ λU 27.3 mm NU 2x34 Krms 0.3 – 0.8

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SLIDE 26

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel
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SLIDE 27

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel
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SLIDE 28

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel
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SLIDE 29

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel
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SLIDE 30

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

~ 0.8 ps

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SLIDE 31

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Spontaneous radiation Log book 4.5.2004

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SLIDE 32

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel
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SLIDE 33

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Experiments with I R f rom FEL

Pulse-stacking cavity ring-down measurements IR near-field microscopy and spectroscopy Pump-probe experiments in the sub-ps regime IR investigations of semiconductor and quantum structures IR spectroscopy of complex molecules Surface studies and modifications Medical and biomedical investigations Infrared microspectrometry of environmental samples (Radiochemistry)

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SLIDE 34

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

HLD

High Field Lab

ELBE

Radiation Source

High Field Lab Dresden 60 T @ 1000 ms 70 T @ 100 ms 100 T @ 10 ms

Combinat ion of ELBE FEL (3 …150 µm) and High Magnet ic Field Lab I R spect rosokopie at high magnet ic f ields 2µB · 100 T » h·c / 100 µm

High Magnetic Fields & ELBE

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SLIDE 35

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

2 20 12 U120 1.7 24 10 U100 1.3 30 8 U80

Krms

max

Nu λ λ λ λu[cm]

10 15 20 25 30 35 40 10 100 20 2000 5 50 500 100 5000 1000 200 K

max rms = 0.78 (U27)

1.3 (U80) K

min rms = 0.3

2

U27 U80

50 200 wavenumber [cm

  • 1]

λ1 [µm]

E

kin e [MeV]

10 15 20 25 30 35 40 10 100 20 2000 5 50 500 100 5000 1000 200 K

max rms = 0.78 (U27)

1.67 (U100) K

min rms = 0.3

2

U 2 7 U100

50 200 wavenumber [cm

  • 1]

λ1 [µm]

E

kin e [MeV]

10 15 20 25 30 35 40 10 100 20 2000 5 50 500 100 5000 1000 200

U 1 2

K

max rms = 0.78(U27)

2.0 (U120) K

min rms = 0.3

2

U27

50 200 wavenumber [cm

  • 1]

λ1 [µm]

E

kin e [MeV]

0,5 1,0 1,5 2,0 10 15 20 25 30 35 40

150µm 70µm 300µm 50µm 100µm 20µm 200µm 15µm 30µm

E

kin e [MeV]

Krms

Plans f or longer wavelength FEL (20- 200µm)

Wave guide needed !

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SLIDE 36

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Neutrons at ELBE (TU Dresden)

Deuteronen- Probenposition B Probenposition A E=(14.93±0.27) MeV Neutronen E=(14.37±0.12) MeV

<

Tritiumtarget

d + t n + α α α α

<

strahl

ELBE elect rons

e -

W(γ γ γ γ,xn)

e

γ γ γ γbs

n n W

neutrons

~ 1013 ns-1 (continuum) ~ 1012 ns-1 (14 MeV) ~ ∆τ< ∆τ< ∆τ< ∆τ<100 ps 14 MeV neut ron gerer at or

Fusion reactor studies (ITER): interaction of fast neutrons with construction materials study of the energy dependence of neutron – nucleus cross sections by time of flight technique triggered fission studies for the spectroscopy of neutron-rich medium mass nuclei

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SLIDE 37

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Schematic view of EPOS (ELBE Positron Source)

Martin-Luther-Universität Halle

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SLIDE 38

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Variety of applications in all f ield of materials science:

  • def ect -dept h prof iles due t o sur f ace

modif icat ions and ion implant at ion

  • t ribology (mechanical damage of surf aces)
  • polymer physics (pores; int erdif f usion; …

)

  • low-k mat er ials (t hin high porous layers)
  • def ect s in semiconduct ors, cer amics and

met als

  • epit axial layers (growt h def ect s, misf it

def ect s at int erf ace, … )

  • f ast kinet ics (e.g. precipit at ion processes in

Al alloys; def ect annealing; dif f usion; … )

  • radiat ion resist ance (e.g. space mat erials)
  • many more …
  • EPOS will be t he combinat ion of a

posit ron lif et ime spect romet er, Doppler coincidence, and AMOC

  • main f eat ures:
  • ult r a high-int ensit y bunched

posit ron beam (E+=1… 30 keV)

  • very good t ime resolut ion by

using t he unique primar y t ime st ruct ure of ELBE

  • high qualit y spect r a by lif et ime

and Doppler spect roscopy in coincidence mode

  • f ast lif et ime mode (single

det ect or mode) f or kinet ic invest igat ions

  • very high count rat e (>

106 s-1) by mult i-det ect or ar r ay

  • convent ional source included f or

Doppler measur ement s (when primar y beam is not available)

  • f ully remot e cont rol via I nt ernet

by user

EPOS = ELBE Positron Source

defect

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SLIDE 39

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Cavity: Niobium 3+½ cell (TESLA Geometry) Choke filter Operation: T = 1.8 K Frequency: 1.3 GHz HF power: 10 kW Electron energy: 10 MeV Average current: 1 mA Cathode: Cs2Te thermally insulated, LN2 cooled Laser: 262 nm, 1W Pulse frequency: 13 MHz & < 1 MHz Bunch charge: 77 pC & 1 nC

Normal-conducting cathode inside SC cavity

Successful Proof of Principle Experiment, D. Janssen et al., NIM A507(2003)314

ELBE SRF Photogun – Basic Design

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SLIDE 40

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

SRF-Gun

3½-cell cavity Tuning system RF input coupler Cryostat

cathode insert&cooling He-vessel & port LN2 cooling & port magnetic shield, vacuum diagnostics

LHe transfer line & distribution box Driver Laser Laser beam line Photocathode preparation equipment Photocathode transfer&storage Low level rf system Power rf system Control systems

Synchronisation He-pressure&level Tuning, rf system, laser Beam line devices PSS, MPS, Vacuum

Diagnostic beam line

View ports, current, beam shape Energy and energy width Bunch length, emittance

ELBE connection beam line test benches for Critical component

Main Components of the ELBE SRF Photogun

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SLIDE 41

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

ELBE SRF Photogun – Cryomodule design

vacuum vessel He & N ports tuner motors cavity alignment cathode storage & transportation chamber cathode exchange system Beam line connection

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SLIDE 42

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

He-vessel power coupler HOM filter gun half-cell choke filter cathode cathode cooler LN2 reservoir Cathode transfer rod

ELBE SRF Photogun – Cavity design

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SLIDE 43

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

ELBE SRF Photogun – Cathode preparation chamber

evaporators laser light ports shutter rate monitors cathode

Technology: Co-evaporation process

from CERN Trautner, Suberlucq, Chevallay, 2001 4 evaporators with

  • tellurium
  • Cs2CrO4 (saes getters)

2 deposition rate monitors

  • separate measurements for Te and Cs
  • control of 1 : 2 ratio

cathode heating cathode cleaning (ion sputtering) Q.E. measuring with 262 nm, 10 mW laser

  • during deposition
  • aging
  • distribution (laser spot scan)
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SLIDE 44

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

ELBE SRF Photogun – Present Status

Cavity: Design finished Fabrication of 2 (RRR 40 & 300) cavities at ACCEL GmbH and a third cavity by Peking University Cavity tuners: Fabrication finished tests necessary Cathode cooling system: Design finished, in fabrication Cathode transfer system: Design finished Cathode preparation chamber: Design finished, in the work-shop Cryomodule: Design will be finished in July

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SLIDE 45

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Thank you for your attention

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SLIDE 46

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

ELBE SRF Photogun – Liquid N2 Cathode Cooling

cathode cathode cooler LN2 reservoir

Cone in cooler

  • centres cathode
  • cathode is pressed in by spring
  • thermal contact of cone surface ?

Test bench thermal conductance measurements, cathode temperature? & test of the cathode transfer system

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SLIDE 47

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

ELBE SRF Photogun – Cathode Exchange & Transport

cathode transfer root linear & rotation exchange chamber places for 5 cathodes

2 identical systems at the SRF-gun (accelerator hall) & at the cathode preparation chamber (preparation lab) transportation chambers allow cathode transport in vacuum accurate adjustment of the cathode; minimum particle generation during exchange

transportation chamber

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SLIDE 48

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Mai Juni Juli Aug. Sep. Okt. Nov. Dez.

2000 4000 6000 8000 10000 12000 14000 16000 18000 20000 146 h

two shifts full time

163 h 190 h 140 h 199 h 310 h 72 h 37 h

beam time 2003

beam on / min month

bremsstrahlung channeling delepment of components machine

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SLIDE 49

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Collaboration: Collaboration:

BESSY, Berlin Max-Born-Institut, Berlin TJNAF, Newport News University of Peking BINP, Novosibirsk DESY, Hamburg & Zeuthen ACCEL GmbH, Bergisch Gladbach Technische Universität, Dresden IfE-Automatisierung GmbH, Dresden Ingenieurkontor Stephan, Dresden

The ELBE crew

(visiting the ELBE river source, Spindleruv Mlyn, Czech Republic, April 2003)

Thank you for YOUR attention

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SLIDE 50

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel
  • 50

50 100 150 200 2 4 6 8 10 12 200 300 400 500 600 700

Photo cathode current Beam dump current Current / µA Laser phase / deg Energy / keV Energy

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SLIDE 51

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

L B O A O M p h o to d io d e p ie z o fo r sy n c h ro n isa tio n fe e d b a c k sig n a l N d :Y L F N d :Y L F

A P M o s c illa to r

p ie z o fo r m o d e lo c k in g m o n o m o d e fib e r

RF gun

L B O crys tal B B O crys tal λ = 5 2 6 n m

5 -p a s s a m p lifie r

u ltr a v io le t: g r e e n : in fra r e d :

λ = 1 0 5 3 n m

U V c o n v e rs io n s ta g e

F a ra d a y ro ta to r F a ra d a y iso la to r

P = 1 .6 W

P = 8 W P = 1 6 W P = 1 6 W f = 2 5 .9 2 M H z P = 1 W

N d :Y L F N d :Y L F p u m p d io d e p u m p d io d e p u m p d io d e p u m p d io d e p u m p d io d e p u m p d io d e λ = 2 6 3 n m τ = 5 p s (F W H M ) σ = 2 p s f = 2 5 .9 2 M H z

Radiation source ELBE

Drive laser Drive laser

Laser scheme
  • diode pumped

diode pumped

  • scillator & amplifier
  • scillator & amplifier
  • P=1

P=1÷ ÷2W @ 262 nm 2W @ 262 nm 26 MHz rep. Rate 26 MHz rep. Rate ∼ ∼ ∼ ∼ ∼ ∼ ∼ ∼5 5 ps ps FWHM FWHM synchronization 1 synchronization 1 ps ps MBI, Berlin MBI, Berlin

  • I. Will, T.
  • I. Will, T. Quast

Quast Note: 1W @ 262 nm Note: 1W @ 262 nm QE 1% QE 1% ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ 80 80 pC pC QE 10% QE 10% ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ 0.8 0.8 nC nC

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SLIDE 52

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

What next? What next?

  • New cryostat connected to refrigerator to work at 2 K
  • New cavity 3½ cells, want to go to 25 MV/m

Common project proposal at BMBF FZR-BESSY-MBI

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SLIDE 53

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

The Spectrum of Electromagnetic Radiation

electromagnetic radiation at ELBE

#

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SLIDE 54

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Puls compression

subharmonic buncher

time focus

gun sc RF cavity

E+∆E E-∆E

RF ~500ps ~5ps

#

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SLIDE 55

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

ELBE radio-frequency accelerator

74 , = = c v β

250 keV, 1 mA

999687 , = β

20 MeV . 1mA = 20kW

Niobium cavity 1.8 K liquid He vessel

10 kW Klystron #

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SLIDE 56

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

1. Since the phase information is lost, direct pulse shape reconstruction is impossible.

The pulse length calculation

  • 2. Fourier transform of the Autocorrelation is Power Spectrum.

Autocorrelation

(measured)

Power Spectrum

(measured)

Bunch Shape

(suggestion or guess)

Power Spectrum

(calculated)

Modified Power Spectrum

Comparison

FFT FFT Filter

#

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SLIDE 57

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

Scattering on the Bremsstrahl-radiator

2σ ∼ 2σ ∼ 2σ ∼ 2σ ∼ 15 mm

R45 γ γ γ γ

OTR e Be window

#

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SLIDE 58

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

100 200 300 400 500 600 700 800 900 1000 400 600 800 1000 1200 1400 1600 1800 2000

Taget Temp. vs Dump Current 4 mm Niob Target, 14.01.2003 Target Temp. (°C) Dump Current (mA)

Diagnostics at the Bremsstrahl-radiator

#

slide-59
SLIDE 59

Strahlungsquelle ELBE

Mitglied der Leibniz-Gemeinschaft

  • Dr. Peter Michel

ELBE-Infrarot

7 insertable Be OTR viewer Longitudinal movable YAG screen

#