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The GammasphereTapeFMA and GammasphereDiscFMA handlers support the current Ge+BGO formats plus FMA FERA extensions.
This is the standard handler for Gammasphere experiments at Argonne.

The GammasphereTapeFMAOrig handler supports the basic Ge+BGO formats plus FMA FERA extensions.
This was the standard handler for Gammasphere experiments at Argonne, prior to 2003, and has been super-ceded.

The event header is output as a 9 word group as follows ...

header[255] (cleange,dirtyge_bgoonly,ttH,ttM,ttL,tac1,tac2,gelowsum,bgolowsum)

The GE and BGO detectors are output as N-parameter groups,
where the number of words in the following list is dependent on the value of "modeflags" ...

ge[1:110] (hit_pattern,ge_high,ge_side,ge_time,ge_trap,ge_low,bgo_time,bgo_low)

The (optional) FERA detectors are output as N-parameter groups as follows ...
It should be noted that all data for a particular FERA VSN appears as one group.

DiscFMAAug2016 version

The event header is output as a 5 word group as follows ...

header[255] (cleange,dirtyge_bgoonly,ttH,ttM,ttL)

The GE detectors are output as N-parameter groups,
where the number of words in the following list is dependent on the value of "modeflags"

For the Aug 2016 data N=4 ...

ge[1:110] (hit_pattern,ge_high,ge_side,ge_time)

TapeFMA DiscFMA modification - Apr2006 onwards


ChanPlate1[111] (q1,q2)                                           ! VSN=22
ChanPlate2[112] (q1,q2)                                           ! VSN=23
ChanPlate1b[114] (q1,q2)                                          ! VSN=21
ppac[115]       (p_left,p_right,p_up,p_down)                      ! VSN=24
IonChamber[113] (de1,de2,de3,depr1,depr2,depr3,cpgstac,rftac)     ! VSN=25
cd[256:287] (eid:4,e:12,tid:4,t:12)



VSN 21 (15 in HEX)    OR
VSN 22 (16 in HEX)    Channel Plate 1

	channel 0 = Q1
	channel 1 = Q2

VSN 23 (17 in hex)    Channel plate 2

	channel 0 = Q1
	channel 1 = Q2

VSN 24 (18 in HEX)    PPAC

	channel 0 = LEFT
	channel 1 = RIGHT
	channel 2 = UP
	channel 3 = DOWN

VSN 25 (19 in HEX)    ION Chamber

	channel 1	DE1
	channel 2	DE2
	channel 3	DE3
	channel 4	CPGSTAC
2006 now ...
	channel 0	DE1
	channel 1	DE2
	channel 2	DE3
	channel 3	DE1PUR
	channel 4	DE2PUR
	channel 5	DE3PUR
	channel 6	TGCP      (tac started with CP, stopped with Ge OR)
        channel 7       TCPRF     (tac started with CP, stopped with
	RF selected by Ge OR)

VSN 49 (31 in HEX)    Si CD particle detector  (added Aug 2008)

       32 groups of E,T pairs

N.B. If channel numbers above change, then handler will need recompiling. If change is likely, then it will need a config file defining.

Isomer Tag revision

The Isomer Tag modeflag is tested, and data output to 3 word groups as per numbering scheme in the Data Format on the Gammasphere website.

In this case, no FERA data is expected.

This is currently an untested feature, so users be warned. Problems and also successful operation should be reported to us.

e.g.
isomer[1:4,6] (header, time , energy)
ge[7:110] (hit_pattern,ge_high,ge_side,ge_time,ge_trap,ge_low,bgo_time,bgo_low)

Tape Format

The GammasphereTapeFMA handler requires tape volume name of the form TAPEnn, where nn is a number to differentiate different tapes.
Filenames are of the form runxx, where xx is the run number taken from the file header.

TapeFMA DiscFMA definitions - Jun2003 onwards

ChanPlate1[111] (q1,q2)

ChanPlate2[112] (q1,q2)

IonChamber[113] (de1,de2,de3,cpgstac,rftac)

FMA definitions - Original Version

ChanPlate1[111] (q1,q2,q3,q4,qtot)

ChanPlate2[112] (q1,q2,q3,q4,qtot)

IonChamber[113] (rftac,pu,de3,rgtac,de1) 

VSN 21 (15 in HEX)    Channel Plate 1

	channel 0 = Q1
	channel 1 = Q2
	channel 2 = Q3
	channel 3 = Q4
	channel 4 = Qtot

VSN 22 (16 in hex)    Channel plate 2

	channel 0 = Q1
	channel 1 = Q2
	channel 2 = Q3
	channel 3 = Q4
	channel 4 = Qtot

VSN 23 (17 in HEX)    ION Chamber

	channel 9 	RFTAC
	channel 12	PU
	channel 13	DE3
	channel 14	RGTAC
	channel 15	DE1

FMA definitions - Feb2000 revision

These are newer definitions, but are compatible with the previous version. Just use group numbers and formats as appropriate.

IonChamber[114] (de_ic1,de_ic2,de_ic3,gsppac_tof,ppacrf_tof)

ppac[115] (p_left,p_right,p_up,p_down)

mball[121:216] (energy,time,tail))

nwall[221:249] (elow,ehigh,tail,tof,zerocross)

These correspond to the raw FERA formats ... 

VSN 24 (18 in HEX)    PPAC

	channel 0 = LEFT
	channel 1 = RIGHT
	channel 2 = UP
	channel 3 = DOWN

VSN 24 (18 in HEX)    ION Chamber

	channel 5 	RFTAC

VSN 25 (19 in HEX)    ION Chamber

	channel 0 = DE_IC1
	channel 1 = DE_IC2
	channel 2 = DE_IC3
	channel 3 = DE_PPAC
	channel 4 = GSPPAC_TOF
        channel 5 = PPACRF_TOF

Microball

VSN  97-102 (61-66 in HEX)    Energies
VSN 113-118 (71-76 in HEX)    Times
VSN 129-135 (81-86 in HEX)    Tails

Neutron array

VSN  49,52 (31,34 in HEX)    Low energies
VSN  50,53 (32,35 in HEX)    High energies
VSN  51,54 (33,36 in HEX)    Tail
VSN  55,57 (37,39 in HEX)    Time of flight
VSN  56,58 (38,3a in HEX)    Zero-crossing

Prescan Tape Format

The GammasphereTapeFMAPrescan handler supports a compressed tape format as follows ... 

 Event separator   FFFF 
 
 1st word: NNNN NNNN ---- ---- Run number
           ---- ---- NNNN NNNN Number of words in this event
 
 2nd word: 0NNN NNNN ---- ---- Total Ge fold
           ---- ---- 0NNN NNNN Clean Ge fold
 
 3rd word: NNNN NNNN ---- ---- Raw BGO sum energy/8
           ---- ---- NNNN NNNN Raw Ge lowres sum energy/8

 4th word: 1--- ---- ---- ---- Set if FMA data present
           -000 ---- ---- ---- Unused
           ---- NNNN ---- ---- #neutrons
           ---- ---- NNNN ---- #protons
           ---- ---- ---- NNNN #alphas

-----------------------------------------------------------------------
Ge data follows ...

 1st word: 0--- ---- ---- ---- Unused
           -NNN ---- ---- ---- side channel (Devlin)
           ---- -000 ---- ---- Unused
           ---- ---N ---- ---- Thick target tag (Set adds 3rd word)
           ---- ---- 0NNN NNNN detector number

 2nd word: 00-- ---- ---- ---- Unused
           --NN NNNN NNNN NNNN detector energy

 3rd word: 0000 ---- ---- ---- Unused
           ---- NNNN NNNN NNNN Ge time
      
-----------------------------------------------------------------------
Neutron data follows ...

 1st word: 1111 ---- ---- ---- Tag
           ---- 0000 0--- ---- Unused
           ---- ---- -NNN NNNN detector number

 2nd word: 0000 ---- ---- ---- Unused
           ---- NNNN NNNN NNNN Elow 

-----------------------------------------------------------------------
Proton data follows ...

 1st word: 0001 ---- ---- ---- Tag
           ---- 0000 0--- ---- Unused
           ---- ---- -NNN NNNN detector number

 2nd word: 0000 ---- ---- ---- Unused
           ---- NNNN NNNN NNNN Energy

-----------------------------------------------------------------------
Alpha data follows ...

 1st word: 0100 ---- ---- ---- Tag
           ---- 0000 0--- ---- Unused
           ---- ---- -NNN NNNN detector number

 2nd word: 0000 ---- ---- ---- Unused
           ---- NNNN NNNN NNNN Elow 

-----------------------------------------------------------------------
FMA data follows ...

 1st word: 0000 00-- ---- ---- Unused
           ---- --NN NNNN NNNN M/Q value (right-left + 300)

 2nd word: 0000 00-- ---- ---- Unused
           ---- --NN NNNN NNNN PPAC-Gammasphere TOF

-----------------------------------------------------------------------

This is mapped onto the following format statements ... 

trigger[255] (total_fold,clean_fold,raw_bgo,lowres_ge,fma_present,neutrons,protons,alphas)

ge[1:110] (side,energy,time)

neutron[221:250] (energy) 

proton[121:220] (energy) 

alpha[256:344] (energy) 

fma[254] (mq,tof)

Devlin convention

1= unsegmented detector (no correction)
2= centre (no correction)
3= high ratio of detector divided into thirds (adjust angle by +2.9)
4=  low ratio of detector divided into thirds (adjust angle by -2.9)
5= high ratio of detector divided into halves (adjust angle by +2.4)
6=  low ratio of detector divided into halves (adjust angle by -2.4)

Further info

Basic Gammasphere info may be obtained from the gammasphere-bnl-translator page.

Further information may be obtained from the Gammasphere documentation web page.

Maintained by Janet Sampson and John Cresswell (University of Liverpool)
Email to support@ns.ph.liv.ac.uk