cngs run 2007: radiation issues

CNGS Run 2007Radiation Issues

Edda Gschwendtner On behalf the

CNGS Secondary Beam Working Group

6th LHC Radiation Workshop29 November 2007

E Gschwendtner ABATB 2

Outline

bull CNGS Overviewbull Run 2007bull Radiation Issues during the Runbull Expected Radiation Levelsbull Summary



CNGS (CERN Neutrino Gran Sasso)

ndash A long base-line neutrino beam facility (732km)

ndash send beam produced at CERN

ndash detect appearance in OPERA experiment at Gran Sasso direct proof of - oscillation (appearance experiment)

Task for CERN produce intense beam towards Gran Sasso



Beam parameters Nominal CNGS beam

Nominal energy [GeV] 400

Normalized emittance [m] H=12 V=7

Emittance [m] H=0028 V= 0016

Momentum spread pp 007 +- 20

extractions per cycle 2 separated by 50 ms

Batch length [s] 105

of bunches per pulse 2100

Intensity per extraction [1013 p] 24

Bunch length [ns] (4) 2

Bunch spacing [ns] 5

Beta at focus [m] hor 10 vert 20

Beam sizes at 400 GeV [mm] 05 mm

Beam divergence [mrad] hor 005 vert 003

CNGS Proton Beam Parameters

Expected beam performance 45 x 1019 protonsyear on target



most challenging zone Target Chamber (targetndashhornndashreflector)

CNGS Challengesbull High Intensity High Energy Proton Beam

ndash Tune tune tunendash Induced radioactivity

bull In components shielding fluids etchellipndash Intervention on equipment lsquoimpossiblersquo

bull Remote handling by overhead cranebull Replace broken equipment no repairbull Human intervention only after long lsquocooling timersquo

ndash Design of equipment compromisebull Eg horn inner conductor for neutrino yield thin tube for

reliability thick tube

bull Intense Short Beam Pulses Small Beam Spotndash Interlock interlock interlockndash Thermo mechanical shocks by energy deposition

(designing target rods thin windows etchellip)



protons

pionskaons

muonsneutrinos

Neutrinosto Gran Sasso

SPS

LHC

CNGS



CNGS Layout

p + C (interactions) + K+ (decay in flight) + +

434m100m

1095m 18m 5m 5m67m

27m

TBID (multiplicity) Muon DetectorsPit 1 Pit 2



Installation oftarget magazine

(4 in-situ spares)

Installation of Focusing magnet

(lsquoHornrsquo)

CNGS Target Chamber



60cm

270cm

1125cm

LHC type Beam Loss Monitorsbull Stainless steel cylinder bull Al electrodes 05cm separation

bull N2 gas filling

bull 2x41 fixed monitors + 2x1 movable

Muon Monitors

Online feedback to neutrino beam quality (sensitivity to any misalignment of beam vs target vs horn hornreflector currents etchellip)



CNGS Run 2007 (1709-22102007)Smooth start-up very good beam performancendash 38 OPERA events in bricksndash More than 400 events from interactions outside OPERA detector

CC interaction Muon 7GeVc

Tue 2 Oct 170425



CNGS Run 2007 (1709-22102007)

bull Smooth start-up very good beam performancendash 38 OPERA events in bricksndash More than 400 events from interactions outside OPERA detector

bull Successive failures in the ventilation systemndash Strong efforts made by TSCV to save the situation

bull Physics run stopped on Monday 22 October 2007 5 days ahead of timendash Failures in the ventilation system control electronics that blocked

switching to access mode in a safe manner

intolerable for an INB facility



CNGS Electronics Layout

Temperature Probes

Ventilation Units

Target Chamber

ServiceGallery

Proton Beam Linetarget horn He tube 1 reflector He tube 2 decay tube

hellipelectronics equipment

Radiation lsquosafersquo area for electronics

TCV4

TSG4


E Gschwendtner ABATB 13M Batz SBWG 311007

TCV4 TSG4

Surface

Ventilation System

for CNGS

Unit 232

TSG44



M Batz SBWG 311007

Incidents of CNGS Ventilation System

TCV4 TSG4

Surface

SEU in ventilation electronics Loss of Control and Communication1 amp 2) Electronics of PLC Com PLC unit

237 and remote IO in unit 232 failed 3 Repeater in profibus failed causes

units in TCV4 and units 519 and 231 to stop

3 x Incidents



CNGS Radiation Levels Calculations with FLUKA

Simulation environmentbull Unified approach for

ndash physics (neutrino and muon fluxes) ndash engineering (power deposition) ndash prompt (radiation damage) dose ratesndash residual (maintenance and interventions) dose rates

bull Reasonably detailed geometry down to muon pits ndash each BLM simulated in detail

bull Service and connection galleries empty ndash no rack no ventilation unit no piping no ducts no doors no

dividing walls should be conservative

bull Common effort of ABATB RP INFN

Available outputs for radiationbull Absorbed and equivalent dose maps (prompt and residual)bull High energy hadron fluencesbull 1 MeV neutron equivalent fluences (for Si damage)bull Particle spectra at several locations

M Brugger A Ferrari LSarchiapone ABATB



Expected Dose Levels

01-1 Gyyr

Gyyr for a nominal CNGS year of 45 1019 pot

Electronics for CV cranefire detection

lsquoSafersquo Area Electronics for

AB IT TShellip Ventilation UnitsElectronics of Ventilation

Units must be moved

M Brugger A Ferrari LSarchiapone 281107 FLUKA

TSG4TCV4

TCC4



Switchboard

TransformerBattery charger

Electronics Racks

TSG4

Control Equipment in the CNGS Area

Ventilation System Crane Fire Detectors Transformers Battery Charger Switchboard Ethernet

Control for Target Shutter Decay Tube Temperature Probes Horn amp Reflector Cooling system Radiation Detector Beam Instrumentation (BLMs TBID BFCT BPMs)

lsquoSafersquo Area for Electronics



Expected Neutron Fluence

1 MeV eq neutron fluence (cm-2 yr-1) for a nominal CNGS year of 45 1019 pot

109-1010 1MeV n eqcm2yr


TSG4

TCV4

TCC4



Expected High Energy Hadron Fluence

Energetic (gt 20 MeV) hadron fluence (cm-2 yr-1) for a nominal CNGS year of 45 1019 pot

107-108 hadronscm2yr


TSG4

TCV4

TCC4



Radiation Measurements

bull RadMon Monitors (T Wijnands)bull TLDs (SCRP)

bull PMI detectors (SCRP)

TCV4 lsquosafersquo area for electr TSG4 (vent units)

proton beamtarget

X

X

X Measurements only during last day of operation 721016 pot



Summary I

bull Detailed analysis and comparison between the simulations and measurements ongoingndash The numbers basically agree

bull Some better understanding of RadMon monitor sensitivity needed

bull No major changes in simulations (updated geometry) with respect to previous calculations confirmed by measurements



Summary IIbull All installed electronics are COTS (most not even rad hard)bull Nearest completely safe area is ~1000m awaybull For much of the electronics there are technical reasons to limit the

cable lengths to lt100m

bull For MTBF gt 1yearndash Area with electronics must be shielded (gain factor gt104 )

ndash Or move electronics to storage area and add shieldingndash For both cases

bull Critical equipment for access must be moved to the surface (mainly ventilation parts)

bull Redundancy and preventive maintenance and actions

bull Radiation monitoring

CNGS must be ready for beam on 28 May 2008



Spare Slides



High energy hadron levels TCV4

Energetic (gt 20 MeV) hadron fluence (cm-2 yr-1) for a nominal CNGS year of 45 1019 pot vertical cut along TCV4




Example Expected Particle Spectra in TSG4

Neutron (black) photon (purple) and electron (red) spectra in the service gallery

M

Bru

gg

er

A

Fer

rari

L

Sar

chia

po

ne

28

110

7 F

LU

KA



Possible solutions1) leave electronics in place

add shieldingRequired reduction factor ~104

Typical shielding ~16m Fe + ~1m concrete but hermetic



Possible solutions

2) use existing tunnel (TSG40) to house all the electronicsndash TSG40 is foreseen as garage to store broken

hornreflectortarget during the lifetime of the facility Alternative storage areas must be found in that case



2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr

2 E12 potextrMD (+strip-line cable)

21 Sept 07 28 Sept 07 1 Oct 07

Setting-up of secondary beam

-Alignment beam vs target vs horn

-Calibration of TBID

-Study behavior for neutrinosantineutrinos

With reference setting increasing intensity

-Setting up of SC-Interlock tests-hornreflector test

CNGS 07 Commissioning Week 38-40

Time

potextr

Total ~5E16 pot

First brick event



CNGS Physics Run 2007

5 Oct 07 12 Oct 07 19 Oct 07

2 E13 potextrFirst brick event63E17 pot 84E16 pot

72E16 pot

Total 79 E17 pot

Modifications in ventilation control

Loss of ventilation control Stop beam

Stop CNGS non-standard mode of operation (access) not possible in an INB controlled facility



On-line Muon Profiles after Optimizations

2 x 14E13potextr

Horizontal pit1

Vertical pit2Vertical pit1

Horizontal pit2

bull Pit 1 sensitive to target vs horn alignment

bull Pit 2 sensitive to beam vs target alignment



Radiological Issues

bull Beam onndash lt 100Svh outside the horn shieldingndash lt 2Svh in service gallery

bull Beam off immediately afterwardsndash 100mSvh

For intervention dose rate lt 2mSvintervention (CERN

rule) Examples

ndash 1 week shutdown to change a motor of the targetndash 1 month shutdown to exchange the horn

bull Only possible because most is remotely handled

Access is controlled

with lsquoradiation vetorsquo



Outline

bull CNGS Overviewbull Run 2007bull Radiation Issues during the Runbull Expected Radiation Levelsbull Summary







































protons

pionskaons

muonsneutrinos


SPS

LHC

CNGS



CNGS Layout


434m100m

1095m 18m 5m 5m67m

27m





(4 in-situ spares)


(lsquoHornrsquo)

CNGS Target Chamber



60cm

270cm

1125cm


bull N2 gas filling


Muon Monitors






Tue 2 Oct 170425



CNGS Run 2007 (1709-22102007)









Temperature Probes

Ventilation Units

Target Chamber

ServiceGallery




TCV4

TSG4



TCV4 TSG4

Surface

Ventilation System

for CNGS

Unit 232

TSG44



M Batz SBWG 311007


TCV4 TSG4

Surface




3 x Incidents















01-1 Gyyr





Units must be moved


TSG4TCV4

TCC4



Switchboard


Electronics Racks

TSG4











TSG4

TCV4

TCC4







TSG4

TCV4

TCC4







proton beamtarget

X

X




Summary I
















Spare Slides










M

Bru

gg

er

A

Fer

rari

L

Sar

chia

po

ne

28

110

7 F

LU

KA








Possible solutions





2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples











































protons

pionskaons

muonsneutrinos


SPS

LHC

CNGS



CNGS Layout


434m100m

1095m 18m 5m 5m67m

27m





(4 in-situ spares)


(lsquoHornrsquo)

CNGS Target Chamber



60cm

270cm

1125cm


bull N2 gas filling


Muon Monitors






Tue 2 Oct 170425



CNGS Run 2007 (1709-22102007)









Temperature Probes

Ventilation Units

Target Chamber

ServiceGallery




TCV4

TSG4



TCV4 TSG4

Surface

Ventilation System

for CNGS

Unit 232

TSG44



M Batz SBWG 311007


TCV4 TSG4

Surface




3 x Incidents















01-1 Gyyr





Units must be moved


TSG4TCV4

TCC4



Switchboard


Electronics Racks

TSG4











TSG4

TCV4

TCC4







TSG4

TCV4

TCC4







proton beamtarget

X

X




Summary I
















Spare Slides










M

Bru

gg

er

A

Fer

rari

L

Sar

chia

po

ne

28

110

7 F

LU

KA








Possible solutions





2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples







CNGS Layout


434m100m

1095m 18m 5m 5m67m

27m





(4 in-situ spares)


(lsquoHornrsquo)

CNGS Target Chamber



60cm

270cm

1125cm


bull N2 gas filling


Muon Monitors






Tue 2 Oct 170425



CNGS Run 2007 (1709-22102007)









Temperature Probes

Ventilation Units

Target Chamber

ServiceGallery




TCV4

TSG4



TCV4 TSG4

Surface

Ventilation System

for CNGS

Unit 232

TSG44



M Batz SBWG 311007


TCV4 TSG4

Surface




3 x Incidents















01-1 Gyyr





Units must be moved


TSG4TCV4

TCC4



Switchboard


Electronics Racks

TSG4











TSG4

TCV4

TCC4







TSG4

TCV4

TCC4







proton beamtarget

X

X




Summary I
















Spare Slides










M

Bru

gg

er

A

Fer

rari

L

Sar

chia

po

ne

28

110

7 F

LU

KA








Possible solutions





2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples








(4 in-situ spares)


(lsquoHornrsquo)

CNGS Target Chamber



60cm

270cm

1125cm


bull N2 gas filling


Muon Monitors






Tue 2 Oct 170425



CNGS Run 2007 (1709-22102007)









Temperature Probes

Ventilation Units

Target Chamber

ServiceGallery




TCV4

TSG4



TCV4 TSG4

Surface

Ventilation System

for CNGS

Unit 232

TSG44



M Batz SBWG 311007


TCV4 TSG4

Surface




3 x Incidents















01-1 Gyyr





Units must be moved


TSG4TCV4

TCC4



Switchboard


Electronics Racks

TSG4











TSG4

TCV4

TCC4







TSG4

TCV4

TCC4







proton beamtarget

X

X




Summary I
















Spare Slides










M

Bru

gg

er

A

Fer

rari

L

Sar

chia

po

ne

28

110

7 F

LU

KA








Possible solutions





2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples







60cm

270cm

1125cm


bull N2 gas filling


Muon Monitors






Tue 2 Oct 170425



CNGS Run 2007 (1709-22102007)









Temperature Probes

Ventilation Units

Target Chamber

ServiceGallery




TCV4

TSG4



TCV4 TSG4

Surface

Ventilation System

for CNGS

Unit 232

TSG44



M Batz SBWG 311007


TCV4 TSG4

Surface




3 x Incidents















01-1 Gyyr





Units must be moved


TSG4TCV4

TCC4



Switchboard


Electronics Racks

TSG4











TSG4

TCV4

TCC4







TSG4

TCV4

TCC4







proton beamtarget

X

X




Summary I
















Spare Slides










M

Bru

gg

er

A

Fer

rari

L

Sar

chia

po

ne

28

110

7 F

LU

KA








Possible solutions





2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples









Tue 2 Oct 170425



CNGS Run 2007 (1709-22102007)









Temperature Probes

Ventilation Units

Target Chamber

ServiceGallery




TCV4

TSG4



TCV4 TSG4

Surface

Ventilation System

for CNGS

Unit 232

TSG44



M Batz SBWG 311007


TCV4 TSG4

Surface




3 x Incidents















01-1 Gyyr





Units must be moved


TSG4TCV4

TCC4



Switchboard


Electronics Racks

TSG4











TSG4

TCV4

TCC4







TSG4

TCV4

TCC4







proton beamtarget

X

X




Summary I
















Spare Slides










M

Bru

gg

er

A

Fer

rari

L

Sar

chia

po

ne

28

110

7 F

LU

KA








Possible solutions





2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples







CNGS Run 2007 (1709-22102007)









Temperature Probes

Ventilation Units

Target Chamber

ServiceGallery




TCV4

TSG4



TCV4 TSG4

Surface

Ventilation System

for CNGS

Unit 232

TSG44



M Batz SBWG 311007


TCV4 TSG4

Surface




3 x Incidents















01-1 Gyyr





Units must be moved


TSG4TCV4

TCC4



Switchboard


Electronics Racks

TSG4











TSG4

TCV4

TCC4







TSG4

TCV4

TCC4







proton beamtarget

X

X




Summary I
















Spare Slides










M

Bru

gg

er

A

Fer

rari

L

Sar

chia

po

ne

28

110

7 F

LU

KA








Possible solutions





2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples








Temperature Probes

Ventilation Units

Target Chamber

ServiceGallery




TCV4

TSG4



TCV4 TSG4

Surface

Ventilation System

for CNGS

Unit 232

TSG44



M Batz SBWG 311007


TCV4 TSG4

Surface




3 x Incidents















01-1 Gyyr





Units must be moved


TSG4TCV4

TCC4



Switchboard


Electronics Racks

TSG4











TSG4

TCV4

TCC4







TSG4

TCV4

TCC4







proton beamtarget

X

X




Summary I
















Spare Slides










M

Bru

gg

er

A

Fer

rari

L

Sar

chia

po

ne

28

110

7 F

LU

KA








Possible solutions





2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples







TCV4 TSG4

Surface

Ventilation System

for CNGS

Unit 232

TSG44



M Batz SBWG 311007


TCV4 TSG4

Surface




3 x Incidents















01-1 Gyyr





Units must be moved


TSG4TCV4

TCC4



Switchboard


Electronics Racks

TSG4











TSG4

TCV4

TCC4







TSG4

TCV4

TCC4







proton beamtarget

X

X




Summary I
















Spare Slides










M

Bru

gg

er

A

Fer

rari

L

Sar

chia

po

ne

28

110

7 F

LU

KA








Possible solutions





2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples







M Batz SBWG 311007


TCV4 TSG4

Surface




3 x Incidents















01-1 Gyyr





Units must be moved


TSG4TCV4

TCC4



Switchboard


Electronics Racks

TSG4











TSG4

TCV4

TCC4







TSG4

TCV4

TCC4







proton beamtarget

X

X




Summary I
















Spare Slides










M

Bru

gg

er

A

Fer

rari

L

Sar

chia

po

ne

28

110

7 F

LU

KA








Possible solutions





2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples



















01-1 Gyyr





Units must be moved


TSG4TCV4

TCC4



Switchboard


Electronics Racks

TSG4











TSG4

TCV4

TCC4







TSG4

TCV4

TCC4







proton beamtarget

X

X




Summary I
















Spare Slides










M

Bru

gg

er

A

Fer

rari

L

Sar

chia

po

ne

28

110

7 F

LU

KA








Possible solutions





2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples







Switchboard


Electronics Racks

TSG4











TSG4

TCV4

TCC4







TSG4

TCV4

TCC4







proton beamtarget

X

X




Summary I
















Spare Slides










M

Bru

gg

er

A

Fer

rari

L

Sar

chia

po

ne

28

110

7 F

LU

KA








Possible solutions





2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples











TSG4

TCV4

TCC4







TSG4

TCV4

TCC4







proton beamtarget

X

X




Summary I
















Spare Slides










M

Bru

gg

er

A

Fer

rari

L

Sar

chia

po

ne

28

110

7 F

LU

KA








Possible solutions





2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples











TSG4

TCV4

TCC4







proton beamtarget

X

X




Summary I
















Spare Slides










M

Bru

gg

er

A

Fer

rari

L

Sar

chia

po

ne

28

110

7 F

LU

KA








Possible solutions





2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples











proton beamtarget

X

X




Summary I
















Spare Slides










M

Bru

gg

er

A

Fer

rari

L

Sar

chia

po

ne

28

110

7 F

LU

KA








Possible solutions





2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples







Summary I
















Spare Slides










M

Bru

gg

er

A

Fer

rari

L

Sar

chia

po

ne

28

110

7 F

LU

KA








Possible solutions





2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples

















Spare Slides










M

Bru

gg

er

A

Fer

rari

L

Sar

chia

po

ne

28

110

7 F

LU

KA








Possible solutions





2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples














M

Bru

gg

er

A

Fer

rari

L

Sar

chia

po

ne

28

110

7 F

LU

KA








Possible solutions





2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples












Possible solutions





2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples







2 Oct 07 184E13 pot

(max 2006 177E13 pot)

24 hr run

184 E13 potextr


21 Sept 07 28 Sept 07 1 Oct 07








Time

potextr

Total ~5E16 pot

First brick event




5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples








5 Oct 07 12 Oct 07 19 Oct 07


72E16 pot

Total 79 E17 pot







2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples








2 x 14E13potextr

Horizontal pit1


Horizontal pit2





Radiological Issues




rule) Examples







Radiological Issues




rule) Examples





cngs run 2007: radiation issues

Documents

misalignment of beam

beam sizes

kmsend nm beam

intense nm beam

cngs secondary beam

small beam spotinterlock

beam divergence mradhor

ventilation electronics