AMIGA Status Report Uwe Fröhlich Auger Collaboration Meeting - 2011/11/14 University of Siegen - Department of Physics For the AMIGA Group.

AMIGA Status Report

Uwe Fröhlich

Auger Collaboration Meeting - 2011/11/14

University of Siegen - Department of Physics

For the AMIGA Group

2

Infill Status

• Infill completed on September 9th!• 61 stations deployed• Exposure as of September 30, 2011:

35.7 km2 sr y• Nominal aperture for the full Infill:

42 km2 sr• Twice statistics every year!

• 14 GAP notes since 2009• 1 ICRC presentation in 2009 + 3 in

2011• Infill spectrum paper in preparation

• Future: Deployment of a denser Infill ???

Uwe Fröhlich - Collaboration Meeting - 2011/11/14

ICRC 2011

3

BATATA Status

• BATATA arrived to Malargüe from Mexico on June 2011

• 1st installation mission on July – August:– Transportation of 3 planes to the site– Construction of a pit (3x3x3 m)– Preparation of shielding (~2000 sand bags)– Installation of the first plane

• 2nd installation on September – October:– Installation of the power system– Preparation of planes 2 and 3– Stable data taking with plane 1 for 43 days


4

Installation of muon counters

• First triangle (May 2011)– 4 muon counters at 3 SD stations on

the 750 m grid

• Pre Unitary Cell (January 2012)– 7 10m2 muon counters, i.e. 1 per

UC position– Power System already installed

(solar panels, batteries, cabling)– 2 modules almost ready– 4 modules will be ready by mid of

December– 4 modules will be deployed in

January to complete the Pre Unitary Cell


5

Installation of muon counters

• Unitary Cell (estimated 2012)– 14 10m2 and 14 5m2 modules, i.e.

2 and 2 per UC position– 7 10m2 + 13 5m2 modules to be

deployed before September 2012• 3 modules simultaneously per month

starting on March 2012

– Deployment of Twins?• Equip an 8th SD station with muon

counters to check for fluctuations


6

AMIGA telecomms

• Data transfer requirements:

– 20 T2 timestamps / second

(20-bit number (microsecond) +

4 bits additional data)

– AMIGA muon data:

1.4 Kbit sent• every 10 seconds when HEAT is

working• every 1 minute otherwise


• All data sent in parallel with the existing Leeds radio

7

AMIGA telecomms

• Telecomms solution proposed for UC:

– Industrial grade XBee pro radios– Wireless standard 802.15.4– Ultra low power consumption

– AMIGA uses 3 channels in the wireless band

– Each channel:• Effective bit rate: 125 kbps• 100 bytes frames


8

AMIGA telecomms:Proposed solutions, laboratory and field tests


Two coordinator software versions:

• Version 1:– Poll based coordinator– Assigns a time frame for the

subscriber to answer within a given time

– Advantages:• Channel only used once per subscriber• Very robust for error correction

– Disadvantage:• Slower than version 2

Test results:

• Average response time of around 10 ms

useful for the UC but not for the full array

• Packet loss of 470 ppm• No data loss• Optimum packet size: 2

standard XBee packets (214 bytes)

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AMIGA telecomms:Proposed solutions, laboratory and field tests


Two coordinator software versions:

• Version 2:– TDM based coordinator– Assigns a time frame for each

station and searches each frame periodically for data

– Advantages:• Faster than version 1

– Disadvantage:• Not that robust for data error correction

Test results:

• Average response time of around 10 ms does not exist for this software version

enough bandwidth for the full AMIGA array

• Efficiency is about 97 %

still not enough for Auger requirements (99 %)

10

AMIGA telecomms:WiFi alternative


COIHUECO

• 600 mW Avg. TX Power 802.11b/g-based 2.4GHz radio

• Up to 10km of range performance,

25+Mbps of throughput

• Link calculation for the farther tank from Coihueco (Feche 0736) using WiFi

11

AMIGA telecomms:WiFi alternative – Field measurements


Field measurements of throughput per channel conducted close to Coihueco

T2 lists ____T3 ____Muon data ____

Time [s]

No. of Bits

12

New MCU Board

• Replacement of current MCU Board (after pre-unitary cell)

• Connection between muon counters and surface electronics– Ethernet instead of CAN bus

• Running a Linux system– Remotely programmable

• Provides temperature and humidity monitoring

• Prototype in production• Communication with Digital

Board FPGA tested (lab)


13

New 320 MHz code

• Acquisition code has been written

• Hardware tests (lab) are beeing performed

• T1 – T3 fully working• 100% compatible with the

current Digital Board• System control simplified

(e.g. setting threshold values)


14

New 320 MHz code: Testing

• Currently: 320 MHz internal arbitrary pattern generator– 32 bits timestamp (ensures

unique patterns)– 6 bits channel identifier– 218 bits pattern data

Successfully tested

• Later: external pattern generator board


15

Synchronisation with SD array

• Idea:– record all T1 events– request T3 events by GPS

timestamp

• Problem: UB generates T1 GPS timestamp (GTS) too late

• Solution:– Muon data will be recorded

with local timestamp (LTS)– When requesting T3 data

(CDAS), the GTS will be translated into the corresponding LTS


Local Station(UB + FE)

Auxiliary Board I

Muon CounterUnderground Electronics

T1 + LTSAuxiliary Board II

LTS + GTS

SBC

CDASGTS

LTS

T3 data

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Synchronisation with SD array

• Status:

Extraction of T1 trigger + LTS

Recording of T1 data

Request data by LTS

Reaction on CDAS requests

Translation GTS LTS

Should be tested with the SD station „Jamie“ at the main building within the next weeks


Local Station(UB + FE)

Auxiliary Board I

Muon CounterUnderground Electronics

T1 + LTSAuxiliary Board II

LTS + GTS

SBC

CDASGTS

LTS

T3 data

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Electronics production

• 27 electronics setups have been successfully build and tested– Single board tests after production– Full system tests after assembling

• All boards passed the tests or could be repaired

• Currently 2 setups / week• Resources could be at least

doubled


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1 spe XT + 1 muon!

1 spe XT + 2 muons!

Simulations


Proton Shower 1017.50 eV, 30o

Electronics and optical features taken into account

19Uwe Fröhlich - Collaboration Meeting - 2011/11/14

Data (ICRC 2011)

Relatively low energy showers may produce high multiplicity events if their impact point falls nearby.

SimulationsData vs Simulations

Sim. Data

20Uwe Fröhlich - Collaboration Meeting - 2011/11/14

Reconstruction: MLDF

Saturated

Ideal geometric reconstruction assumed (no SD rec.)Silent (<3 muons) and saturated (>100 muons) counters properly taken into account

MLDF quite satisfactoryat 1017.50 eV (Proton)

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Summary

• Infill fully operational• A lot of activity

• BATATA installation ongoing

• First triangle of muon counters installed

• Pre unitary cell in January 2012• UC in 2012

• Telecomms for UC ready• WiFi solution for the full array

under development


• New MCU board prototype in production

• 320 MHz code has been written and is currently tested

• T1 trigger with local timestamp implemented

• Test system at the main building („Jamie“) will allow for testing the full trigger system

• Full simulation chain working• First results from simulations

AMIGA Status Report Uwe Fröhlich Auger Collaboration Meeting - 2011/11/14 University of Siegen - Department of Physics For the AMIGA Group.

Documents

amiga group slide

infill status infill

stable data

installation mission

low power consumption

existing leeds radio

denser infill

uc position power system