Status report of the large 23m diameter LST telescope North South - - PowerPoint PPT Presentation

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status report of the large 23m diameter lst telescope
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Status report of the large 23m diameter LST telescope North South - - PowerPoint PPT Presentation

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Status report of the large 23m diameter LST telescope North South M P I R e v i e w M e e t i n g D e c e m b e r 2 0 1 2 All sky observatory o m a s S c h w e i z e r T h LST 23m SST

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SLIDE 1

Thomas Schweizer, LST meeting Amsterdam, May 2012

Status report of the large 23m diameter LST telescope

M P I R e v i e w M e e t i n g D e c e m b e r 2 1 2

T h

  • m

a s S c h w e i z e r

LST ¡23m MST ¡10-­‑12m SST ¡4-­‑6m All ¡sky ¡observatory South North

Monday, September 17, 12

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SLIDE 2

Rich Science cases with LSTs

LST should be optimized in the energy range between 20 - 200 GeV

Low energy threshold

Trigger threshold: 15-20 GeV

Analysis threshold: 20-30 GeV

key physics cases:

High-redshift AGNs and GRBs, Expand the Gamma Ray Horizon

Binaries, Pulsars and other type of transients at low energy

High ¡redshiA ¡AGNs ¡(z<2) GRBs ¡(z<4) Pulsars Binaries ¡and ¡transients

Monday, September 17, 12

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SLIDE 3

CTA Large Size Telescope: Structure by MPI Munich

Diameter: 23m

Dish area: about 400 m2

F/D = 1.2, F=28m

Dish profile: Parabolic

Permanent Active Mirror Control

FOV = 4.5 degrees, Pixel size = 0.1 degrees (1855ch camera)

Light weight carbon fibre structure ~ 65 tons

Fast rotation: <180 deg/20 sec

Dish profile: parabolic  isochronicity: <0.6ns peak to peak

Camera sagging: < 1 pixels

Camera oscillation in wind gust: <8mm 50 km/h wind

Designed by MPI and MERO

Monday, September 17, 12

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SLIDE 4

CTA Large Size Telescope: Responsibilities by Institutes

MPI Munich:

Telescope design + LST project coordination

Dish structure

Understructure

IFAE, Barcelona, Spain:

Rail system + Foundation

Boggies + Drive system

LAPP, Annecy, France

Arch design

Camera Frame

Drive electronics

Ciemat, Madrid, Spain:

Camera Body

Spain, several institutes

Trigger electronics + Data transfer

Japan:

Mirrors

Readout electronics

Designed by MPI and MERO

Monday, September 17, 12

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SLIDE 5

5

Main LST team at MPI

Mechanical workshop head: Thomas Haubold

LST Structure Project engineer: Holger Wetteskind

Glueing und carbon fibre expert: Christopher Jablonski

Elevation drive: Will get new engineer

CTA LST telescope project coordinator: Masahiro Teshima

LST structure coordinator: Thomas Schweizer

LST Structure Designer with MERO: Eckart Lorenz

LST postdoc (new): Koji Noda

Monday, September 17, 12

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SLIDE 6

Thomas Schweizer, LST meeting Amsterdam, May2012

Understructure with carbon fibre tubes: 2 technologies

Tubes that have to hold up to 32 tons have glued end pieces with safety factor 4 on tubes (>130t), 5 (>150t) on glueing, 170mm diameter, 6-7 mm thickness Tubes that have to hold 32-65 tons Safety factor 4 on tubes (>260t), factor 1.8 on T-Igel endpiece (>130t), 280mm diameter, 10-12mm thickness Tubes on bottom, Steal

high forces

glued Endpieces T-Igel endpiece

Monday, September 17, 12

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SLIDE 7

7

Glueing technology designed at MPI (Christopher Jablonski)

Monday, September 17, 12

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SLIDE 8

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Glueing test design (Christopher Jablonski)

Monday, September 17, 12

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SLIDE 9

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T-Igel endpiece design, flanch and cone (Christopher Jablonski)

Monday, September 17, 12

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SLIDE 10

10

Need 56m double focal length

Segment of dish structure in MPI garden

Monday, September 17, 12

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SLIDE 11

Rack and Pinion drive system by F. Granena (IFAE)

Monday, September 17, 12

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SLIDE 12

RAIL & Foundation Design

Monday, September 17, 12

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SLIDE 13

Design of Drive electronics: LAPP

Synchronous ¡motors Siemens ¡FT7 ¡series ¡ Velocity AcceleraOon LAPP IN2P3 Positioning speed in GRB follow up: 180 degrees / 20 sec Drive ¡PLC ¡system OPC ¡UA ¡test ¡is ¡on-­‑going ¡ Drive ¡MoOon ¡Controller Siemens ¡S120 ¡series

Peak 220 kW during 8 sec

Monday, September 17, 12

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SLIDE 14

Monday, September 17, 12

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SLIDE 15

Dynamical calculation for Arch

Monday, September 17, 12

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SLIDE 16

Optical axis and permanent AMC (Active Mirror Control)

Define optical axis with the IR Laser beams

HR CCD camera at the center of dish to monitor the optical axis and star field  pointing direction in sky

(Camera LED position) ‒ (Optical axis Laser position)  camera sag

(Mirror Laser positions) ‒ (Optical axis Laser position)  mirror direction

Target LED LED LED LED OA-­‑Lazer MIR-­‑Lazers SKY MIR-­‑Lazers Stars

IMAGE ¡with ¡HR ¡CCD ¡Camera

PMT ¡-­‑ CAMERA

Monday, September 17, 12

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SLIDE 17

Mirror layout and mounting scheme

 205 Hex-shape mirrors of 2m2 area)  Total area ～405m2

supporting plate Mounting scheme Asymmetric telescope axis

Monday, September 17, 12

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SLIDE 18

1510mm LST MIRROR prototype at Sanko

2.7mm Glass＋60mm Al.Honeycomb＋2.7mm Glass Specifications  F2F：1510mm  Area：2m2  R: ¡56.0 ¡– ¡58.4 ¡m  D80： ¡10mm(1/5 ¡pixel)  Weight： ¡45kg

 SpuAering ¡mulF ¡layer ¡coat  Cr ¡+ ¡Al ¡+ ¡SiO2 ¡+HfO2 ¡+ ¡SiO2  Reasonably ¡High ¡reflecFvity  Strong ¡protecFve ¡surface  Long ¡life ¡Fme

SpuAering ¡Cr ¡+ ¡Al ¡+ ¡SiO2 ¡+ ¡HfO2 ¡+ ¡SiO2

Monday, September 17, 12

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SLIDE 19

Camera design

Monday, September 17, 12

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SLIDE 20

Readout ¡Electronics ¡and ¡Water ¡Cooling 1GHz ¡samples/s, ¡4096 ¡memories/ch

Dragon ¡Cluster ¡module ¡ for ¡7pmts ¡(1/265) 3 ¡cluster ¡module for ¡trigger ¡test ¡(1/80) Water ¡Cooling ¡plates ¡for 37 ¡cluster ¡modules ¡(1/8)

Full ¡size

Monday, September 17, 12

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SLIDE 21

Testing water cooling of simulation PCB

w/o ¡Aluminum ¡plate, ¡heat ¡pipes, ¡floaOng w ¡Al. ¡plate, ¡contact ¡to ¡Water ¡C.P. w ¡Al. ¡plate, ¡heat ¡pipes, ¡contact ¡to ¡Water ¡C.P. The ¡locaOon ¡of ¡FPGA ¡shows ¡70 ¡degreees. Just ¡with ¡Al. ¡Plate ¡is ¡not ¡so ¡bad. With ¡Al. ¡plate ¡+ ¡cooling ¡pies ¡looks ¡beeer

Monday, September 17, 12

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SLIDE 22

Alternative cooling with air

Monday, September 17, 12

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SLIDE 23

Testing air cooling

Monday, September 17, 12

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SLIDE 24

Testing air cooling

Monday, September 17, 12

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SLIDE 25

3-cluster camera

Digital Trigger Analog Trigger

Monday, September 17, 12

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SLIDE 26

Tentative global time schedule

Monday, September 17, 12

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SLIDE 27

The end

26

Monday, September 17, 12

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SLIDE 28

Test of Cooling plate

Mini-Camera(37clusters, 1/8 LST camera)

1000L water tank

(works as chiller)

pump

20mm thickness aluminum plate 10mmΦ Long holes 32L/min 8 water channels/holes in the cooling plate 20 channels for full scale camera. ~1m

Monday, September 17, 12

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SLIDE 29

Test of water cooling plate

PC pump Water tank

as a chiller

IR camera cooling plate Thermometer

Monday, September 17, 12

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SLIDE 30

Test of water cooling plate

PC pump Water tank

as a chiller

IR camera cooling plate Thermometer

Monday, September 17, 12

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SLIDE 31

Monday, September 17, 12

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SLIDE 32

Monday, September 17, 12

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SLIDE 33

Winston Cone Prototyping in Japan 4Euro/pcs in mass production

Designed ¡in ¡ICRR, ¡Ibaraki-­‑U ¡and ¡Nagoya-­‑U

Monday, September 17, 12

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SLIDE 34

Rail Design

Monday, September 17, 12

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SLIDE 35

Rail and bogey system

Monday, September 17, 12

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SLIDE 36

New ¡Actuator ¡700N. ¡SF=3

Monday, September 17, 12

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SLIDE 37

Sanko Mirror #01

Monday, September 17, 12

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SLIDE 38

Calculations for Wind by Ferran Granena (IFAE): We have uplift during storm

Monday, September 17, 12

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SLIDE 39

PMD system is installed at ICRR, U-Tokyo (developed by experts of Erlangen optic group)

Installed ¡at ¡ICRR U.Tokyo

Monday, September 17, 12

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SLIDE 40

Monday, September 17, 12

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SLIDE 41

Attach AMC Laser Holder

1510mm 1743.6mm 871.8mm 871.8mm 435.9mm 60.0mm 100.0mm

Monday, September 17, 12

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SLIDE 42

Attach AMC Laser Holder

1510mm 1743.6mm 871.8mm 871.8mm 435.9mm 60.0mm 100.0mm Cut ¡out

Monday, September 17, 12

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SLIDE 43

Attach AMC Laser Holder

1510mm 1743.6mm 871.8mm 871.8mm 435.9mm 60.0mm 100.0mm

Monday, September 17, 12

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SLIDE 44

XY ¡direcOon Z ¡direcOon Tilt ¡in ¡YZ ¡plane

Monday, September 17, 12