1. LHCf – CSN1 Trieste O. Adriani
Status report di LHCf
O. Adriani
Trieste, CSN1, 19 Settembre 2006
Assemblaggio dei detectors
Test beam
Programma dell’installazione (2007)
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

2. Experimental Method: 2 independent detectors on both sides of IP
The direct measurement of the p production cross section as function of pT is essential to correctly estimate the energy of the primary cosmic rays
(LHC: 1017 eV)
Simulation of an atmospheric shower due to a 1019 eV proton.
Experimental Method: 2 independent detectors on both sides of IP
Detector I
Tungsten
Scintillator
Scintillating fibers
Detector II
Tungsten
Scintillator
Silicon mstrips
INTERACTION POINT
140 m
140 m
Beam line
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

3. LHCf – CSN1 Trieste O. Adriani
The TAN and LHCf
box ~ (15×15×40) cm3
manipulator
marble
shielding
boxes for
DAQ electronic
IP1 (Atlas region) was definitely chosen in October 2005
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

4. LHCf – CSN1 Trieste O. Adriani
ARM #1 detector
scintillating fibers
tungsten layers
2 towers (2.02.0cm2 and 4.04.0 cm2)
~47 r.l. (22  2.1 r.l. tungsten layers)
16 scintillator layers (3 mm thick)
4 pairs of scintillating fiber layers for tracking purpose (two orthogonal directions)
scintillators
Energy
Impact point (h)
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

5. LHCf – CSN1 Trieste O. Adriani
ARM #2 detector
We used LHC style
electronics and readout
2 towers (2.52.5cm2 and 3.53.5 cm2)
44 r.l. (22  2 r.l. tungsten layers)
16 scintillator layers (3 mm thick)
4 pairs of silicon microstrip layers for tracking purpose (X and Y directions)
Energy
silicon layers
Impact point (h)
See TDR for details…
scintillators
tungsten layers
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

6. Development of showers in Arm #2 E γ= 500 GeV
Fluka based
simulation
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

7. Monte Carlo g ray energy spectrum
(5% Energy resolution is taken into account)
106 generated LHC interactions 
1 minute cm-2s-1 luminosity Discrimination between various models is feasible
Quantitative discrimination with the help of a properly defined c2 discriminating variable based on the spectrum shape
(see TDR for details)
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

8. LHCf – CSN1 Trieste O. Adriani
Where we are with Arm1?
Arm1 was fully assembled in Japan in July 2006 (scintillators + fibers + Tungsten) and brought to CERN for the Beam Test
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

9. LHCf – CSN1 Trieste O. Adriani
Where we are with Arm2?
Plastic scintillators + Light guides + Tungsten:
Production in Japan finished in July 2006
They were brought in Florence end of July
First Silicon module (Milestone INFN):
Production in Florence finished in July 2006
Assembly of Arm2:
It was done in Florence in August 1-15
Arm1 was brought at CERN for the beam test on August 16, 2006
Please note:
Arm1 is completed
To complete Arm2 3 more silicon moudules are needed
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

10. LHCf – CSN1 Trieste O. Adriani
Plastic scintillators + Light guides + Tungsten
Florence clean room (thanks to CMS!!!!!)
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

11. The mechanics of the module
25 mm
Light Guides +
Scintillators
Hybrid circuit
Pace Chips
Silicon sensor
Kapton fanout
Tungsten
SiliconX SiliconY
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

12. LHCf – CSN1 Trieste O. Adriani
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

13. LHCf – CSN1 Trieste O. Adriani
The birth of Arm2
Silicon module: 12 X0
X and Y sensors
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

14. LHCf – CSN1 Trieste O. Adriani
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

15. LHCf – CSN1 Trieste O. Adriani
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

16. LHCf – CSN1 Trieste O. Adriani
Readout electronics
LHC style electronics
(Many thanks to CMS!!!!)
DOH
GOL
CCU
PLL
QPLL …
PACE3 chips (CMS preshower)
We have developed
Hybrid circuit (Left+Right)
Mother Board (Logic)
Adc Piggy Back board
DAQ: GOL + Gbit ethernet
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

17. LHCf – CSN1 Trieste O. Adriani
The hybrid and the cables
PACE3
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

18. LHCf – CSN1 Trieste O. Adriani
The readout and ADC boards
ADC
CCUM
QPLL
PLL
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

19. LHCf – CSN1 Trieste O. Adriani
Beam SPS
Arm1 & Arm2 were delivered to Cern on August 16, 2006
They were set up for the beam test
Beam period: August 28, September 4
H4 Test Area
Electrons up to 200 GeV
Protons up to 350 GeV
Muons
Goal of the test beam:
Energy calibration of the calorimeter
Measurement of the spatial resolution of silicon system
Florence telescope (ADAMO) is used to precisely reconstruct tracks
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

20. LHCf – CSN1 Trieste O. Adriani
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

21. Few plots of the beam test results…
A high energy electron shower seen on x and y silicon X Y
<Noise> ~ 5 ADC counts
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

22. LHCf – CSN1 Trieste O. AdrianiY
Beam profile
200 GeV electrons X
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

23. LHCf – CSN1 Trieste O. AdrianiY
Energy measured
200 GeV electrons
Low Gain X
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

24. LHCf – CSN1 Trieste O. AdrianiY
Energy measured
100 GeV electrons
High Gain X
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

25. LHCf – CSN1 Trieste O. AdrianiY
Energy measured
350 GeV protons
High Gain X
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

26. Future plans for the installation: Arm1
Arm1 is now in Florence
TAN for Arm1 will be ‘baked’ in November 2006 (heating up to 200 0C!!!!)
Arm1 will be brought at Cern in January 2007 for the final installation in the TAN (2/3 weeks)
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

27. Future plans for the installation: Arm2
Arm2 is now in Florence
Production of the silicon modules will finish before the end of the year (Milestone INFN)
Arm2 will be deassembled and reassembled again before end of february 2007 with all the silicon modules
Pre-installation of Arm2 in the TAN  April 2007
Baking up of the Arm2 TAN  after summer 2007  Arm2 should be removed after pre-installation!!!!
Final Arm2 installation Fall 2007
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

28. LHCf – CSN1 Trieste O. Adriani
Milestones
50% of the silicon modules: 31/12/2006
100% of silicon modules: 28/02/2007
Pre-installation in the tunnel: 30/06/2007
ata taking with 450 GeV GeV protons: 31/12/2007
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

29. LHCf – CSN1 Trieste O. Adriani
SPARES
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

30. Transverse projection of detector #2 in the TAN slot
Maximization of the acceptance in R (distance from beam center)
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

31. Position resolution of Arm #2 calorimeter
7 mm for 1.8 TeV photons
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

32. p0 geometrical acceptance
Arm #2
Arm #1
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani

33. LHCf – CSN1 Trieste O. Adriani
p0 mass resolution
Arm #1
DE/E=5%
200 mm spatial resolution
Dm/m = 5%
19 Settembre 2006
LHCf – CSN1 Trieste O. Adriani