H.E.S.S. II Camera Status • Overview – Mechanics – Electronics • Conclusions 1 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
Overview – Camera Mechanics – Structure (LLR) – Cones (APC) – Auto-Focus (LAPP) – Loading/Unloading (LAPP) – Shelter (LUTH) – Photo detectors (LPNHE, CESR, LAPP) – Camera Electronics & DAQ – Front End (LPNHE) Camera – L1 Trigger (LPNHE) – L2 Trigger (CEA) – DAQ (LPNHE) – Security (LAPP) – ASICs Test (LPNHE, LPTA) Shelter – Calibration (LPNHE, LPTA) 18m 36m 2 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
Camera Mechanics Back door Cones plate Lid Lateral door Lid Calibration system 3 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
Camera Mechanics Pneumatic locking device 2710 mm 160 2310 mm Auto-focus (Winglets) 2 identical structures: • The Camera 3540 mm • The Dummy Camera 4 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
The Auto-Focus System Self blocking air clamp (2.5 tons) The linear guides are screwed on the mobile green piece which is linked Camera to the camera through the winglet pneumatic clamping device Range: 200mm The bottom yellow part is screwed on the telescope Rails linear actuator Range of auto-focus: 0 / +200 mm for adjusting the focal Length with the elevation (Precision required 10mm, achieved <1mm) 5 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
The Loading/Unloading System 6 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
The Loading/Unloading System & the Shelter The Forklift Shelter (18.2x12.2x5.75) Top View Dummy Camera Camera Rails 6m 4.5m 7 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
Mechanics Status 8 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
Electronics inside the camera Racks 128 Drawers (128x16 PMTs) Power Supply Power Supply 32 drawers 32 drawers Air flow Extract Local Module Trigger Trigger Crate cPCI 21 Slots 10U Pneumatic Control Power supply Ethernet Switch Terminal Server Air flow Extract Air flow Extract Safety Crate DAQ Crate cPCI 21 Slots cPCI 21 Slots 10U 10U Power supply Power supply Power Supply Power Supply Fans, etc. 32 drawers Power Supply AC Dispatcher 32 drawers 9 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
10 FIFO DATA4 TIME STAMP TRIG MNGT FIFO DATA3 IO FANOUTL2_2 TRIGL1_9 FIFO DATA2 FIFO DATA4 FANOUTL2_1 TRIGL1_8 FIFO DATA1 FIFO DATA3 cPCI Trigger Crate TRIGL1_7 cPCI Safety Crate FIFO DATA2 cPCI Data Crate TRIGL1_6 FIFO DATA1 TRIGL1_5 CPU TRIGL1_4 TRIGL1_3 TRIGL1_2 TRIGL1_1 FANOUT2 FANOUT1 TIME STAMP FIFO SLC2 IO TRIGL2_4 FIFO SLC1 TEMP TRIGL2_3 GPS TRIGL2_2 Master TS POS LED TRIGL2_1 CPU LIGHT MON CPU CPU General Camera Schematics 32 Drawers Supply Power P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007 32 Drawers Supply - 8 Serial Slow Control Buses Power -128 Master Drawers 32 Drawers - 16 // Data Buses Supply Power 32 Drawers Supply Power
Drawer Architecture REAR Board 1K Fifo X1 12-bit ADC 16-Bit Data from Prev Drawer SAM PM #1 1K Fifo X25 12-bit ADC Serial Slc from Prev FPGA Drawer 1K Fifo X1 12-bit ADC PM #8 SAM X25 1K Fifo 12-bit ADC JTAG FPGA Programming Pre-Trigger Analogue Board #1 Power Slc Logic FPGA Slow Control Board Drawer Address Analogue Board #2 Pre-Trigger 1K Fifo X1 12-bit ADC PM #9 SAM 1K Fifo X25 12-bit ADC FPGA 16-Bit Data to Next Drawer 1K Fifo X1 12-bit ADC SAM PM #16 Serial Slc to Next Drawer 1K Fifo X25 12-bit ADC 11 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
Drawer Performances Test of the prototype Drawer with a PMT G=2.10 5 SAM sampling Clk=1GHz • Reading window Nf=16 Reading window Nf=13 Charge Distribution Charge Distribution RMS = 66.7848 RMS = 68.5858 MEAN = -8573.0025 MEAN = -10573.2601 -8600.0 -8500.0 -10600.0 -10500.0 10000.0 10000.0 10000.0 10000.0 0.0 0.0 0.0 0.0 -8600.0 -8500.0 -10600.0 -10500.0 Charge Charge #1 #2 50 ADC counts 12 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
The PMTs The H.E.S.S. I version (XP2960) Coaxial cable for the signal Dynode Chain with current protection The H.E.S.S. II version will be a little shorter (flying wires) Tiroirs blue LED & focusing optics Montage optique Bras XY filter Webcam wheels Roues a filtres white source CCD LED PMTs X-Y camera holding automated pulsed structure arm blue LED 13 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
L1 Trigger principle The 2048 pixels are divided into 99 sectors 16 pixels Vertical overlap 32 pixels horizontal Temporal and Sectoral overlap Very fast logic timing Sliding Windows …and expect a minimum energy deposit So we program: - #pe/pixel (Analogue Boards) - #pixels in sectors 14 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
L1 Trigger principle 256 Analogue Boards #Pe/Pixel PMTs Same technique as H.E.S.S. I 28mV/pe PMTs 28mV/pe 1 8 Sub-nanosecond comparators 1 8 Analogue Analogue Drawer Boards Analogue Sum Sum 2ns resolution 11 sectors per board (11 X 9 boards=99 sectors) 11 sectors per board (11 X 9 boards=99 sectors) L1A, L2A, L2R #1 OR L1A, L2A, L2R Local Trigger #i #2 #1 Local Trigger #i OR #2 #3 #3 FPGA Interface to Trig Mngt ASIC Analogue FIFO cPCI FPGA Interface to Trig Mngt cPCI Boards Delay Adder ASIC Analogue ����� FIFO cPCI Delay in DAQ crate Adder ����� ����� #Pixel cPCI #11 ����� ����� cPCI 42mV/pixel #11 ����� DAC FPGA 42mV/pixel (8-bits) DAC FPGA (8-bits) 15 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
L2 Trigger Processor - Mean Input Rate < 5KHz (200µs) - 4 Pre-L2 Asic multiplexed over each of 64 LVDS (serial data) - Possibility of Different Algorithms 256L1A, 256 L2AR 64-LVDS Pairs L2A/R L2 Trigger Trigger Fanout Algorithms Mngt 2bits/pixel 256 Analogue Boards in drawers cPCI Programming L1 Logic DAQ Crate 16 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
L2 Trigger Algorithms Input to L2: - 1 binary image above the L1 threshold Prefiltering Reject - 1 binary image above the L2 threshold ROIs Geometrical Simple Extraction parameters Simple Algorithms Physics - L1 image clustering (NSB) Analysis - Comparison of clusters in the Reject 2 binary images (muons) - Hillas: L/S (muons) scaled width (hadrons) Pattern Recognition Supervised α plot (for point sources) α α α (circle muons) Classification A rejection factor of ~2 is possible Decision on muons Decision on “gamma” Complex Store/Reject Store/Reject Complex Algorithms Neural Networks 17 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
Time stamp • Used to synchronize the Trigger and DAQ events ������������� ����������������� cPCI cPCI (LVDS) Data Clock (typ. 33 MHz) Bunch Counter Reset ����� ������ Acquire ��� ���������� ���������� ����� Serial Data ������ ������ Farm Node ID, etc… Address Data: L1 • Evt Number • Bunch Number • Farm Node ID L2 Accept/Reject ������� ������� �������������������� ������� 18 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
Camera Security cPCI Bus cPCI Interface EP1C4F324C6 Open/close camera doors PM Power supply User Interface IO … T ° Scanner (x32) T ° A T ° 1 Readout Light LEDs A D Control monit. & Fan MUX D C Control C PIN-diode T ° 32 A D Distributed in C DAC1 to 17 DAC1 to 8 the Camera Monitoring of the current 30 V U/I U/I luminosity Zone 1 Zone 8 Positioning Fan control (separated PCB) LEDs 19 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
Quality Procedures From the PMT to the DAQ boards: - To each relevant element a Database Form (MySQL) is filled out during: . the test phase . The maintenance phase - Direct Access by code bar (on PMTs, Asics, boards, drawers, etc…) - Full documentation on CPS (Collaborative Portal Server) 20 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
The PMTs Story • October 2006: (incomplete) answer to the tender by Photonis • Proposed price: 238 € /PM • (tube 175 € +base 58€ + rings 4€) • Negotiations led to -3 € on the HV base (April 12, 2007) � � � � • Total price: 585000€ • Ordering done end of May 2007 � � � � • 2500 PMTs should be received between Oct 07 and May 08 21 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
H.E.S.S. II Electronics Status (continue) 22 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
General Planning (HESS II) 2003 2004 2005 2006 2007 2008 2009 2010 Nº Nom de la tâche T1 T2 T3 T4 T1 T2 T3 T4 T1 T2 T3 T4 T1 T2 T3 T4 T1 T2 T3 T4 T1 T2 T3 T4 T1 T2 T3 T4 T1 1 H.E.S.S. II - France 2 Camera Electronics 22 General Camera Test & Cabling 23 24 Camera Mechanics 40 41 Telescope/Auto Focus Mechanics 61 62 Telescope 23 P. Nayman H.E.S.S. II Biennale LPNHE Septembre 2007
Recommend
More recommend
